Activity 3: Circulatory System
It consists of the heart, blood vessels, and blood, playing a crucial role in transporting nutrients, oxygen, and waste products throughout the body

𓍢ִ໋🌷͙֒ Spleen – large, vascular organ located in the upper left quadrant of the abdomen. It contains white pulp, which is rich in lymphocytes and involved in immune functions, and red pulp, which filters blood and removes old or damaged red blood cells

𓍢ִ໋🌷͙֒. Vena Cava – consists of two large veins, the superior vena cava and the inferior vena cava, which return deoxygenated blood from the body to the right atrium of the heart while superior vena cava collects blood from the upper body, while the inferior vena cava collects blood from the lower body

𓍢ִ໋🌷͙֒. Mammal Vein – blood vessels that carry blood toward the heart and have thinner walls compared to arteries and often contain valves to prevent the backflow of blood; surrounded by a layer of smooth muscle and connective tissue

𓍢ִ໋🌷͙֒. Artery – blood vessels that carry oxygenated blood away from the heart to the tissues of the body. They have thick, elastic walls composed of three layers: the intima, media, and adventitia