papillary muscles
The interventricular septum separates the left and right ventricles. This muscular wall prevents the mixing of oxygen-rich and oxygen-poor blood.
The walls of the ventricles of the heart aren't thinner than the atria, they are thicker. This is because they require more power as they pump blood around the body, while the atria only pump blood the short distance into the ventricles. More muscular walls are therefore needed to provide this power which is why they are thicker. The left ventricle is even thicker than the right ventricle as it requires a lot more power to pump blood all around the body. The right ventricle only pumps blood to the lungs.
The heart has four chambers. The two ventricles (right and left) are muscular chambers that propel the blood out of the heart (the right ventricle to the lungs, and the left ventricle to all other organs). The two atria (right and left) hold the blood returning to the heart, and at just the right moment empty into the right and left ventricles...
the difference between the ventricles and the atria is that the ventricles are thicker
There are two ventricles in the pig heart
Fingerlike projections in the small intestine are called villi
fimbriae
stereocilia
Fallopian tubes. They have got fimbriated ends with finger like projections.
It is the Villi
Villi
intestinal villi (singular: villus)
The finger like projections are called fimbrae
The tubes are called as fallopian tubes.
Projecting from the small intestine are microscopic fingerlike projections known as
they are pseudopod
Fingerlike projections of cytoplasm and known as pseudopod(s). Pseudopd organisms are typically found on in the microscopic subkingdom of Protozoa( genus Amoeba).