Bear and bigcats anatomy - Printable Version

Bear and bigcats anatomy - Printable Version

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RE: Bear and bigcats anatomy - brotherbear - 11-28-2016

Polar; "bears have weak hearts" is nothing other than spam from Parvez. A grizzly was once witnessed running 10 miles non-stop - that is no weak heart.

RE: Bear and bigcats anatomy - brotherbear - 11-28-2016

(11-28-2016, 08:15 PM)parvez Wrote: @~~brotherbear~~ If you see carefully in the video after 2:00, the bear does seem to be drooling and gasping. Drooling is nothing but losing control of mouth muscles due to trembling of lips and other things. that is why drooling happens. That is apparent in these videos.

Wrong Parvez; you are trying to give the bears' human humiliation. A bear does not get embarrassed about drooling, taking a pee, or even a dump during a fight. His mind is a million-miles away from such trivial matters and on the fight at hand. You are simply looking for a weakness in the bears and grasping at smoke.
Try to back up your quickly-made theories with some facts. For instance - a study of the heart of a bear - physical conditions suffered by bears - and so on. Do not create fantastic theories from a video. Post facts.

RE: Bear and bigcats anatomy - parvez - 11-28-2016

(11-28-2016, 08:17 PM)brotherbear Wrote: Polar; "bears have weak hearts" is nothing other than spam from Parvez. A grizzly was once witnessed running 10 miles non-stop - that is no weak heart.

First of all, you do not read my complete posts. That is my assumption and i did not say it is proved. If you clearly read my posts, you can get my balance of mind everywhere i post. Even you have spammed these threads with tiger hating. Like bears own tigers and everything. This is not spam. I challenge let the scientific research be conducted. I am sure the result will be in my favour that bears heart relatively weaker hearts than other parts of the body. You also do not seem to think logically. You directly charge towards poster when something against bears comes from any poster.

RE: Bear and bigcats anatomy - brotherbear - 11-28-2016

Parvez says: First of all, you do not read my complete posts. That is my assumption and i did not say it is proved.
Yes Parvez; I read your complete posts. You just proved my point. You are assuming all kinds of physical problems in bears that do not exist. When you get one of these "theories" in your head; try something new - seek and find the data before you start posting it. So far, I have seen little from you other than spam.

RE: Bear and bigcats anatomy - tigerluver - 11-28-2016

The muscle control-fatigue debate has no scientific basis either way yet, so it's best the topic is dropped to avoid unnecessary conflict. With no info to borrow from, the debate would not lead to something constructive.

RE: Bear and bigcats anatomy - parvez - 11-29-2016

(11-28-2016, 08:31 PM)brotherbear Wrote: So far, I have seen little from you other than spam.

I have posted many pictures on tigers. I have proposed a few theories after careful observations. Everyone were satisfied with those theories. Even on bears, there is no scientific tests conducted on the subject. So, you feel it as spam. Let the scientific tests be conducted. Then everything will be revealed. You also have no answer to the videos i posted. How can you say it is a spam. If it is spam, then you posted that tiger always gets defeated by bears, bears have no matching in animal kingdom. Doesn;t that come under spam? And for the information, i do not hate bears. In fact I love them.

RE: Bear and bigcats anatomy - brotherbear - 11-29-2016

Why I call it spam: you come up with your personal "theories" to attack bears or bear enthusiasts who which, to date, there are only two; myself and polar. If you read our posts, we do not launch attacks against the big cats. In fact, we both greatly admire the big cats as being the worlds' greatest predators since the passing of T-rex. The topic here is big cat and bear anatomy. From here on out, why don't you simply post data, news articles, or any published information rather than simply personal opinions.

RE: Bear and bigcats anatomy - parvez - 11-29-2016

@~~brotherbear~~ Yes, I too was about say the same thing.

Digestion in tigers: (A quick glance)
The biggest difference between carnivorous and herbivorous is the length of their Digestive System. In carnivores, the digestive system (especially the intestines) are much more shorter than in herbivorous. The main reason is that meat is more easy to digest than plants. Meat can be digested far more efficiently than grass. It requires far less complicated gut to convert meat to protein than to convert from grass to protein. Another good reason is that flesh rots very quick, which means that the animal has to be able to process all the nutrients as fast as possible.

Recently, scientists have been observing how many animals self medicate. Tigers, like other cats eat grass to help with digestion or to bring up fur balls. But when looking at the scats of emaciated tigers who were riddled with parasites, zoologist George Schaller noted the presence of both grass and tapeworms, suggesting that tigers ate grass to cleanse the intestines of parasites. Other studies of tiger scats show that their stomach can cope with everything from porcupine quills to bear claws.

Source: http://ninjaturtles-animalsdigestion.weebly.com/tiger.html
http://www.jvbigcats.co.za/tigeranatomy.htm

RE: Bear and bigcats anatomy - parvez - 11-29-2016

Brown bears' digestive system is similar to that of carnivores except that they have elongated intestines to compensate for digestion of vegetarian food. Like ruminants, bears do not have caecum. So, plant components are weakly digested. To compensate for inefficient digestion of cellulose, bears maximize the quality of vegetal food items ingested, typically foraging for plants in the phenological stages of highest nutrient availability and digestibility (Herrero 1985). It is thought that barrel shape of bears body is an indication of a longer intestine.

RE: Bear and bigcats anatomy - parvez - 11-30-2016

Circulatory system of tiger,

*This image is copyright of its original author

Heart rate of tiger ranges from 56-97 beats per minute. Their cardio vascular system is similar to humans, they contain heart and blood vessels.
Bear,

*This image is copyright of its original author

The normal heart rate of bears is 60 - 90 beats per minute (the higher rates are found in cubs). (B64.26.w5)
In summer 40-50 bpm. (D243)
The heart rate is 40-50 bpm (resting rate), reduced to 8-12 bpm during hibernation. (B490.26.w26, D284.w5)

During hibernation

During winter dormancy, 8-10 bpm. (D243)
The heart rate decreases markedly during hibernation. (B147)
During hibernation the heart rate may be as low as 10 beats per minute. (B406.36.w36)
Such a slow beat during hibernation causes blood to pool in the heart's chambers. In a human, the increased pressure would cause the chambers to stretch out. The dilated muscle would be weaker and less efficient, leading ultimately to congestive heart failure.https://www.eurekalert.org/pub_releases/2011-02/uocp-aco020711.php"Bears are able to avoid this," Rourke saidNelson and Robbins had previously shown that, during hibernation, the muscle of a bear's left ventricle stiffens to prevent it from stretching as blood accumulates. But the stiffening of the ventricle presents another problem. The left atrium, which pushes blood into the left ventricle, must then work against greater resistance.The atrium is pushing against a brick wall," Rourke said. "We thought there must be some kind of mechanism to keep the atrial muscle from wearing itself out."Muscle contractions in the heart are controlled by a protein called myosin heavy chain. The protein comes in two varieties, alpha and beta. The alpha version produces a quicker but slightly weaker contraction compared to the beta. "We found that the muscle in the left atrium produces more alpha protein during hibernation, which results in a slightly weaker beat," Rourke said. "The lower force keeps the atrium from being damaged as it pushes against the stiffer ventricle." When the bears emerge from hibernation, the protein ratio switches back and the atrial contraction returns to its original strength.

Source: http://www.press.uchicago.edu/pressReleases/2011/February/1102_PBZ_GrizzlyHearts.html
http://wildpro.twycrosszoo.org/S/0MCarnivor/ursidae/ursus/Ursus_arctos/10Ursus_arctosDetPhy.htm

RE: Bear and bigcats anatomy - Pckts - 12-01-2016

Smaller animals will have higher heart rates and shorter lifespans compared to the larger the animal the slower the heart rate and longer the life (usually). Other animals have perfected this though, such as the Tortoise.
http://eurheartjsupp.oxfordjournals.org/content/7/suppl_H/H16

RE: Bear and bigcats anatomy - parvez - 12-01-2016

I had two rabbits. I once heard their heart beats and got scared thinking they are afraid of me. But after noticing their cool behaviour I googled and found their heart rates and then I was able to relax. Ha ha

RE: Bear and bigcats anatomy - parvez - 12-02-2016

bear muscles, amazing though feel pretty sad for the bear. If we remove fur the face looks similar to a dog, no doubt they originated from dog like ancestors. The head and mouth seem to contain fast twitching muscle fibres which are labelled white.

*This image is copyright of its original author

RE: Bear and bigcats anatomy - brotherbear - 12-02-2016

The Family Tree of Carnivora:

*This image is copyright of its original author

RE: Bear and bigcats anatomy - brotherbear - 12-02-2016

Parvez says: bear muscles, amazing though feel pretty sad for the bear. If we remove fur the face looks similar to a dog, no doubt they originated from dog like
Sad for the bear? Explain.