Question

What is the evolutionary advantage of closed circulatory system over system? A. Open system are subject to contamination form the environment. B. Blood pressure is higher in open systems. C. Blood in closed system can be shunted where it is needed. D. Blood loss is greater in open systems. E. A and D only. Leaves are broad and thin to minimize their absorption of oxygen. Xylem may transport water and materials in either direction depending on where the source and sink are. Transpiration affects the movement of water into roots. Water can hold oxygen than air can Fruits are expanded anthers. Sieve tube members are found in xylem Book lungs are found in crustaceans and mollusks, while external feathery gills are found in Arachnids. Leukocytes help stop blood loss from wounds. The heart of an adult amphibian three chambers. Nerve fibers conduct contraction signal throughout the heart. The contraction of the heart is known as This vein collects blood from the lower body and carries it to the heart: This structure initiates heart contraction:

Answer 1

What is he evolutionary advantage of closed crculatony Sytem over open sytem? A. O/n systems are subject to contamination fromthe environment. B. ood pressure is higher in open systems Blood in closed systems can be shunted where it is needed D. Blood loss is greater in open systems E. A and D only. environmentytem? In a closed circulatory system (humans) blood in closed systems can be shunted where it is needed finally bypassed if the artery or vein is damaged Therefore, rapid e of gases takes place but in open circulatory systems, we cannot bypass via shunt placement COMPLETION systole 41. The contraction of the h 43. This structure initiates heart contraction:

Reason:

Ques-41:

Atrial systole: It is due to impulse produced by sino-auricular (SA) node due to “atrial depolarization” followed by contraction of auricles. It is represented as “P” wave in ECG. This is going to trigger filling of blood into the ventricles (anterograde movement).

Ventricular systole: It is due to the electrical impulse that is propogated from “auriculo-ventricular nodde” through Purkinje fibers to promote anterograde blood flow into the ventricles. It is represented by “QRS” complex due to ventricular depolarization.