The pores on the outer layer of the sponge which takes is water are called POROCYTES.
Sponges are groups of very simple animals which usually grow at a spot, that is, they lack the ability to move from one place to another. There are about 10,000 species of sponges; most sponges live in salt water while some live in fresh water. The body surface of sponges are made up of holes through which water enter into their cells.
B because the plant uses oxygen from water
SYSTOLE
The contraction of ventricles is called systole. Each period of systole is followed by diastole when the heart is at rest. The ejection fraction is the measure of cardiac output every systole. Systole corresponds to the phase 0 which is the point of stimulation. The membrane at this point is depolarized which means that there is no net charge. This time cell cannot contract. During repolarization, sodium goes back the cell and muscles is now ready for another contraction.
