circulatory system

• Arteries are blood vessels that carry oxygenated blood away from the heart to the rest of the body.
• Atria are thin-walled chambers that receive blood from veins
• The heart has four chambers - two atria and two ventricles
• Veins carry deoxygenated blood back to the lungs and heart.
• The heart is located between the lungs, behind the sternum (breastbone), and to the left side of the body.
• The heart has four chambers: two atria and two ventricles.
• Arteries carry oxygenated blood away from the heart to the body.
• The right side of the heart pumps deoxygenated blood into pulmonary arteries, which take it to the lungs for gas exchange with fresh air.
• Veins return deoxygenated blood back to the heart
• Capillaries are tiny, thin walled blood vessels where exchange between cells occurs
• The right atrium receives deoxygenated blood from the vena cava
• Capillaries are tiny, narrow tubes where gas exchange occurs between cells and blood
• Capillaries are tiny, thin-walled blood vessels where exchange between cells occurs.
• Capillaries are tiny, thin-walled blood vessels where exchange between cells occurs.
• Valves prevent backward flow of blood in the heart.
• Valves prevent backward flow of blood in the heart.
• Blood is pumped through arteries by contraction of the left ventricle.
• Blood is pumped through arteries into capillary beds, then returns to the heart via veins
• There are three types of valves in the heart: semilunar valves, bicuspid valve, tricuspid valve.
• Valves prevent backward flow of blood by opening when pressure increases and closing when pressure decreases.
• Blood flows through the heart in one direction only due to valves.
• Capillaries are tiny vessels that connect arterioles to venules and allow for direct contact between cells and blood.
• Veins have thinner walls than arteries and contain less muscle tissue.
• Arteries carry oxygenated blood away from the heart while veins return deoxygenated blood back to the heart.
• The cardiovascular system consists of the heart, blood vessels (arteries, veins, and capillaries), and blood.
• The walls of capillaries are thin and permeable, allowing substances to pass from the bloodstream into tissues or vice versa.
• The circulatory system helps maintain homeostasis by regulating body temperature, pH levels, and the balance of fluids in the body. It also delivers oxygen and nutrients to cells while removing waste products.
• The heart is the main organ of the circulatory system. It pumps blood throughout the body, delivering oxygen and nutrients to cells and removing waste products.
• he three types of blood vessels in the circulatory system are arteries, capillaries, and veins.
• Capillaries are responsible for the exchange of oxygen, nutrients, and waste products between the blood and the body's tissues.
• Capillaries are only one cell thick, which allows for the efficient exchange of substances like oxygen, nutrients, and waste products between the blood and tissues.
• Red blood cells are specialized cells that contain hemoglobin, a protein that binds to oxygen and carries it from the lungs to the body's tissues.
• Red blood cells have a biconcave shape, which provides a larger surface area for the efficient exchange of gases like oxygen and carbon dioxide.
• White blood cells are an essential part of the immune system, as they help the body fight off infections and foreign invaders like bacteria and viruses.
• Platelets play a crucial role in blood clotting. When a blood vessel is damaged, platelets clump together to form a plug at the site of injury, helping to stop bleeding.
• The circulatory system works together with the respiratory system to maintain homeostasis by transporting oxygen from the lungs to the body's tissues via the blood vessels. In return, the circulatory system carries carbon dioxide, a waste product of cellular respiration, from the tissues back to the lungs to be exhaled.