What tissues make up the blood?

The two main tissues that make up the blood are:

- Plasma: Plasma is the liquid component of blood that makes up about 55% of its volume. It is composed of water, electrolytes (such as sodium, potassium, chloride, and bicarbonate ions), proteins (such as albumin, globulins, and fibrinogen), hormones, waste products (such as urea and creatinine), and gases (such as oxygen, carbon dioxide, and nitrogen).

- Cellular components: The cellular components of blood make up about 45% of its volume and consist of red blood cells (erythrocytes), white blood cells (leukocytes), and platelets (thrombocytes).

- Red blood cells (erythrocytes): Red blood cells are the most abundant type of blood cell and make up about 99% of the cellular components. They are responsible for carrying oxygen from the lungs to the tissues and carbon dioxide from the tissues to the lungs.

- White blood cells (leukocytes): White blood cells are less common than red blood cells and make up about 1% of the cellular components. They are part of the body's immune system and help to fight infection. There are several types of white blood cells, including neutrophils, lymphocytes, monocytes, eosinophils, and basophils.

- Platelets (thrombocytes): Platelets are the smallest type of blood cell and make up less than 1% of the cellular components. They are involved in blood clotting and help to stop bleeding.