The heart is a muscular organ that pumps blood. Blood that contains waste materials is brought to the heart by blood vessels. Th
is blood enters the __1__ and then moves down. The presence of the __2__prevets the backflow of blood inside the heart 1. right atrium
left atrium
right ventricle
2. atrioventricular valve
valves in the aorta
valves in the veins
The blood enters the right artrium.The Presence of valves prevents backflow of blood.
<u>Explanation</u>:
The heart is a muscular organ, blood enters the heart through two large veins that is superior and inferior vena cava. Valves opens and close tightly, as heart pumps the blood, the valves prevent the blood to stop flowing in the backward direction. There are two main valves which is tricuspid valve and bicuspid valve. It helps in preventing back flow. The tricuspid valve is present in between right atrium and ventricle. The biscuspid valve is present in between left ventricle and left atrium.
<u>Anaphase</u> is the stage of mitosis after the process of metaphase, when replicated chromosomes are split and the newly-copied chromosomes (daughter chromatids) are moved to opposite poles of the cell. Chromosomes also reach their overall maximum condensation in late anaphase, to help chromosome segregation and the re-formation of the nucleus.
