The circulatory system Flashcards
what are the five functions of the circulatory system
Circulate blood through body,
Transport oxygen, water and nutrients to cell, Transport carbon dioxide and waste away from the cell.
maintain body temperature. White vlood cells fight infections
How does blood circulation work?
during excercise, blood flow redistributes to the working muscles so that 80-90% of total cardiac output is directed to the working mucles
Arteries vasodilate and vasocontrict to allow more or less blood to reach certain body areas.
What do white blood cells do?
White blood cells are responsible for moving to the site of infection where they destroy bacteria and disease causing organisms survive
What role do red blood cells do?
Red blood cells, also known as erythrocytes, transport oxygen from the lungs to the body’s tissues and carry carbon dioxide back to the lungs.
What do the platelets do?
Platelets, also known as thrombocytes, are small, colorless cell fragments in the blood that play a crucial role in stopping bleeding by forming clots when a blood vessel is damaged
What does blood plasma do?
Blood plasma, the liquid part of blood, transports nutrients, hormones, proteins, and waste products throughout the body, and also plays a vital role in maintaining blood pressure, volume, and pH balance, as well as supporting blood clotting and immunity
What does blood transport around the body?
Blood transports oxygen, nutrients, hormones, and immune cells throughout the body, while also removing waste products like carbon dioxide and other metabolic byproducts
where do arteries transport the blood
Arteries carry oxygen-rich blood away from the heart to all parts of the body, including organs, tissues, and cells, where oxygen and nutrients are delivered and waste products are picked up.
where do capillaries transport blood to
Capillaries, the smallest and most numerous of the blood vessels, form the connection between the vessels that carry blood away from the heart (arteries) and the vessels that return blood to the heart (veins)
where do veins transport blood to?
Veins carry blood back towards the heart from the body’s tissues and organs, with the exception of the pulmonary veins which carry oxygen-rich blood from the lungs to the heart
what does systemic circulation do?
Carries blood from the heart to all parts of the body(except lungs) and back.
The left side of the heart pumps oxygenated blood to the rest of the body via the aorta, Deoxegynated blood returns on the ride side of the heart via the vena cava
what is Pulmonary circulation
Carries blood from the heart to the lungs and back again. The right side of the heart pumps deovegynated blood to the lung via the pulmonary artery then oxygenated blood returns to the heart from the lungs via the pulmonary valve
what is the order of circulation of blood through the heart?
Superior vena cava - Right atrium- tricupid valve - right ventricle - pulmonary valve - pulmonary artery - lungs - left atrium - left ventricle - aorta- rest of body
What is the blood flow of the circulatory system?
deoxgynated blood entera right atrium by suplementory valve and goes through lungs to gas exchange at capillaries via arteris, delivers to body
what is inhalation ( inspiration)?
The diaphram contracts and flattens, External intercoatal muscles contract and internal intercostal muscles reax to lift the ribcage up. the volume of the lunges increase as the thoracic cavity expands. air pressure lowers and air is drawn into lungs
Intercostal mucles: contract
Diaphragm Contracts
Lung volume Increase
Air pressure Decreases
Exhalation (expiration)
the diaphragm relaxs becomes dome shaped, External intercostal muscles relax, and internal intercostal muscles contract to the lower rib cage the volume of the lungs decreases as the plerul cavity contracts. Air exists the lungs from an area of high pressure to low pressure.
Intercostal muscles: relax
Diaphragm relaxes
Lung volume decreases
air pressure increase
