Answer:
1. The circulatory system, comprising the heart, blood vessels, and blood, is a vital transportation system that delivers oxygen, nutrients, and hormones, while also removing waste products.
2. The circulatory system consists of three main components: the heart, blood vessels, and blood. The heart acts as a pump, propelling blood throughout the body. Blood vessels, including arteries, veins, and capillaries, serve as the pathways for blood to travel. Blood, made up of red and white blood cells, plasma, and platelets, carries oxygen, nutrients, hormones, and waste products throughout the body. Together, these components work harmoniously to ensure the proper functioning of the circulatory system.
3. The respiratory system, comprising organs like the nose, throat, trachea, bronchi, and lungs, facilitates breathing by transferring oxygen to the bloodstream and removing carbon dioxide, supporting bodily function.
4. The respiratory system consists of several key components. These include the nose, throat (pharynx and larynx), trachea, bronchi, and lungs. When we breathe in, air enters through the nose or mouth, travels down the throat, and enters the trachea. The trachea then branches into two bronchi, which further divide into smaller bronchioles. Finally, the bronchioles lead to the tiny air sacs in the lungs called alveoli. It is in the alveoli where the exchange of oxygen and carbon dioxide takes place. Together, these components work to ensure the proper functioning of the respiratory system.
5. Blood consists of red blood cells, white blood cells, plasma, and platelets. Red blood cells transport oxygen, white blood cells fight infections, plasma carries nutrients, hormones, and waste products, and platelets prevent excessive bleeding. These components support body functions and maintain health.