The main difference between a sheep heart and a frog heart is that sheep have a
four-chambered heart and frog
three-chambered heart.
<span>The heart of an amphibian, such as a frog, has three chambers, one ventricle and two atria. Blood from the ventricle travels to the lungs and skin where respiration occurs and where the blood becomes oxygenated. From the ventricle, blood also travels to the rest of the body where it becomes deoxygenated. In the ventricle, deoxygenated and oxygenated blood are mixed before being pumped out of the heart. </span>
<span>On the other hand, mammals (including sheep) have two atria and two completely divided ventricles. The left side of the heart pumps and receives only oxygenated blood while the right side of the heart pumps and receives only deoxygenated blood, meaning that their systemic and pulmonary systems are separated. The separation of these two systems enables mammals to
deliver more oxygen to their tissues (because there is no mixing of oxygenated and deoxygenated blood)<span>. Thus, mammals' heart is more efficient.</span></span>
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One of the visible feature is that the DNA in a cell is replicating then the most important is that they are splitting of getting divided and form into two identical cells.
The two point discrimination test
is used to determine sensitivity to touch. This test is performed to evaluate the
ability of an individual to identify two close points on a small area of skin
and how well the individual can discriminate the points. The test can be done by
using calipers.
Hox genes are an example of homeobox genes, of which animals and plants have a conserved set. these genes code for signals, signal transduction pathways, and regulatory proteins.
Hox genes are a subset of homeobox genes, which are a class of affiliated genes that determine regions of the body segmentation of an embryo along the head-tail axis of animals. Hox proteins encode and define the features of 'body position', confirming that the right structures develop in the correct areas of the body.
To learn more about Hox genes here
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