Understanding Blood Vessels and Blood Cells: Types & Functions

Types of Blood Vessels:

1. Arteries: Carry oxygenated blood away from the heart to the rest of the body.

2. Veins: Carry deoxygenated blood back to the heart from the rest of the body.

3. Capillaries: The smallest blood vessels, where exchange of oxygen and carbon dioxide occurs between the blood and the tissues.

Types of Blood Cells:

1. Red Blood Cells (Erythrocytes): Contain hemoglobin, which carries oxygen from the lungs to the tissues.

2. White Blood Cells (Leukocytes): Protect the body against infection and disease. There are several types of white blood cells, including neutrophils, lymphocytes, monocytes, eosinophils, and basophils.

3. Platelets (Thrombocytes): Help stop bleeding by forming clots at the site of injury.

4. Plasma: The liquid component of blood that carries blood cells, proteins, hormones, nutrients, and waste products.