1 The epidermis continues to grow. 2 Throughout the day, the body is breaking down blood cells. 3 The cells on the

1. The epidermis is the outermost layer of the skin. It is constantly growing because its cells are dividing and producing new cells. These new cells push the older ones toward the surface, where they eventually shed and are replaced by newer cells.

2. Throughout the day, our body constantly breaks down old or damaged blood cells. This process helps remove waste products and allows the body to replenish itself with fresh, healthy blood cells. Old blood cells are broken down in the spleen and liver, and the components are recycled and used to produce new blood cells.

3. The surface of our skin is made up of a layer called the stratum corneum, which consists of dead skin cells. These cells are constantly being shed and replaced by new cells from the lower layers of the skin. This process is known as desquamation and ensures that the surface of our skin remains healthy and intact.

4. Blood is essential for all living organisms as it carries oxygen, nutrients, and waste products throughout the body. It continuously flows through a complex network of blood vessels, known as the circulatory system. This system includes the heart, arteries, veins, and capillaries, which work together to ensure that blood reaches every cell and organ in the body. The constant flow of blood helps deliver oxygen and nutrients to cells, remove waste products, and maintain a stable internal environment.