Answer: slightly cooler than
Explanation:
The testes are the male gonads. These are found in a loose pouch which is called as the scrotum behind the penis. The testes are responsible for production and storage of sperms which are the male gametes, and fluids which makes up the composition of the semen in males. The testes being the sperm factor functions efficiently when the temperature of the scrotum is slightly cooler than the rest of the body.
Answer:
A
Explanation:
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answer
Increased susceptibility to disease
Answer:
I do not agree with Heather’s definition of homeostasis because, by definition, homeostasis is defined as the ability of a body to create comfortable conditions by being at equilibrium or stabilizing itself internally whenever there are changes externally/outside the body. With regard to homeostasis, the room temperature of the internal part of the body, as with many other things in the body, is dynamic and does not stay at one place when external conditions change—it changes in order to maintain balance or equilibrium; hence, I do not agree with Heather’s definition of homeostasis.
Answer:
The correct answer will be option-B.
Explanation:
Papillary muscles are the muscle present in the ventricle of the heart to which chordae tendinae of the aortic valves gets attached.
The number of papillary muscles varies in both the ventricles as in the right ventricle, three papillary muscles are present whereas in the left ventricle two muscles.
They play an important role in the closing of the AV valves as ventricular contraction causes the chordae tendinae to contract which in turn contract the papillary muscles thereby closing the AV valve and prevent back-flow of the blood to the atria.
Thus, Option-B is the correct answer.
papillary muscles by chordae tendineae. During the relaxation phase of the cardiac cycle, the papillary muscles are also relaxed and the tension on the chordae tendineae is slight (see Figure 12b). However, as the myocardium of the ventricle contracts, so do the papillary muscles. This creates tension on the chordae tendineae (see Figure 13b), helping to hold the cusps of the atrioventricular valves in place and preventing them from being blown back into the atria.
