Blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. As the atrium contracts, blood flows from your right atrium into your right ventricle through the open tricuspid valve.
Explanation:
Social Institutions provide roles to individuals: The social institutions assign role to their members based on their age and other yardsticks. Family assigns relationships based on the age. Similarly, social institutions assign role to members by defining their relationships
Answer:
Heredity.
Explanation:
When genetics are passed from one generation to the next, this is heredity.
