1. Joint diastole is a brief period of relaxation of both the auricles and ventricles.
2. The phrase is termed "double circulation" as there are two circulation systems - Pulmonary and Systemic.
3. Coagulation of blood occurs due to platelets.
Thrombikinase converts prothrombin into thrombin. Thereafter, fibrinogen if converted into fibrin. Then a clot or thrombus is formed.
(Note Calcium ions are necessary for this process).
4. Sparrow has a lower surface volume ratio than humans. Therefore, it loses heat rapidly. In order to distribute heat quickly to its whole body, the heart rate is high.
Students generally engage in physical activity which results in increased blood flow. (i.e vasodilation.)
The face turns red after playing for the same reason.
Outward diffusion/inward diffusion
sat23 88 days ago