Circulatory System

• Veins are blood vessels that carry deoxygenated blood back to the heart.
• Blood flows from the right atrium into the right ventricle through the tricuspid valve.
• The heart has four chambers - two atria and two ventricles.
• The heart is a muscular organ that pumps deoxygenated blood through the arteries and oxygenated blood back to the lungs.
• Arteries are blood vessels that carry oxygenated blood away from the heart to the rest of the body.
• The circulatory system is responsible for transporting substances throughout the body.
• Capillaries are tiny blood vessels where oxygen and nutrients diffuse into tissues and waste products diffuse out.
• The pulmonary artery carries oxygen-poor blood away from the heart to the lungs, where it picks up oxygen and releases carbon dioxide.
• Oxygen-rich blood returns to the left side of the heart via the pulmonary vein.
• The left side of the heart receives oxygen-rich blood from the lungs, while the right side receives oxygen-poor blood from the body's tissues.
• Blood flows from the left atrium into the left ventricle through the bicuspid (mitral) valve.
• The heart is divided into two sides by a wall called the septum.
• Arteries are thick-walled, elastic tubes with smooth inner walls that carry oxygenated blood away from the heart.
• Capillaries are tiny blood vessels where exchange between cells occurs.
• The right side of the heart pumps blood out to the rest of the body, while the left side pumps blood to the lungs.
• Capillaries are tiny, thin-walled blood vessels where exchange between cells occurs.
• The circulatory system consists of the heart, blood vessels (arteries, veins, capillaries), and blood.
• The cardiovascular system consists of the heart, blood vessels (arteries, veins, capillaries), and blood.
• Veins return deoxygenated blood to the heart, while capillaries connect arterioles with venules.
• The heart is located behind the sternum and between the ribcage.
• Veins return oxygen-rich blood from the capillaries to the left side of the heart.
• Blood pressure refers to the force exerted by blood against the walls of blood vessels as it flows through them.
• Blood flows through the right atrium, then passes through the tricuspid valve into the right ventricle.
• Oxygenated blood returns to the left side of the heart via pulmonary veins, while deoxygenated blood leaves the right side of the heart via pulmonary artery.
• Blood flows through the heart in a circular pathway called the cardiac cycle.
• Systole is when the heart contracts and pushes blood out into the arteries.
• Pulmonary circulation involves the movement of blood between the heart and lungs.
• Veins return deoxygenated blood back to the heart.
• The right ventricle contracts, pushing blood through the pulmonary semilunar valve into the pulmonary trunk (pulmonary artery).
• Blood flows from the left ventricle into the aorta through the aortic semilunar valve.
• Valves prevent backward flow of blood within the heart.
• Deoxygenated blood travels through the pulmonary trunk to the lungs, where it picks up oxygen and releases carbon dioxide.
• The right side of the heart pumps deoxygenated blood to the lungs, while the left side pumps oxygenated blood throughout the rest of the body.
• Blood flows from the right atrium into the right ventricle through the tricuspid (atrioventricular) valve.
• Blood flows from the right ventricle into the pulmonary trunk through the pulmonary semilunar valve.
• The superior vena cava brings deoxygenated blood from the upper part of the body to the right atrium.
• Veins have thinner walls than arteries and contain one-way valves to prevent backflow of blood.
• Capillaries are tiny vessels that connect arterioles to venules and allow for the exchange of nutrients between cells and the circulating blood.
• Arteries branch off into smaller arteries called arterioles, which further divide into capillaries.
• The circulatory system consists of the heart, arteries, capillaries, and veins.