In the flow of blood in the body, the following statements are true:
1. Blood picks up oxygen from the cells of the body.
2. Blood delivers carbon dioxide to cells in the body.
3. Blood delivers sugar and nutrients to cells in the body.
Explanation:
1. Blood picks up oxygen from the cells of the body: Oxygen is picked up by red blood cells in the lungs and then carried to different tissues in the body where it is needed for cellular respiration.
2. Blood delivers carbon dioxide to cells in the body: Carbon dioxide is a waste product of cellular respiration and is transported by the blood to the lungs where it is exhaled out of the body.
3. Blood delivers sugar and nutrients to cells in the body: Blood carries glucose and other nutrients obtained from food to cells throughout the body to provide energy and support cellular functions.
The statements that mention blood flowing from the heart to the lungs to pick up oxygen and from the lungs to the heart to pick up oxygen are incorrect as the blood flows from the heart to the lungs to get rid of carbon dioxide and pick up oxygen, and then returns to the heart to be pumped to the rest of the body.
