What is the purpose of the circulatory system?
To carry needed substances to cells and carry waste products away from cells.
-carry blood away from heart
-are thick and muscular
-carry blood under high pressure
-oxygenated (carry oxygen) Exception- pulmonary artery
-carry blood to the heart
-are thinner and less muscular than arteries
-carry blood under less pressure than arteries
-have valves to prevent backflow of blood
-deoxygenated (lacking oxygen) Exception- pulmonary vein
Tiny blood vessels through which substances are exchanged between the blood and body cells
Liquid part of blood that is mostly water and has nutrients, minerals, vitamins and oxygen dissolved in it
Cell fragments that help clot blood
Red Blood Cells
Contain hemoglobin that carries oxygen and carbon dioxide; they have no nuclei; formed in the bone marrow
White Blood Cells
Fight pathogens (bacteria, viruses and other foreign substances) that enter your body; formed in the bone marrow
A+, A-, B+, B-, AB+, AB-, O+, O-
-chemical identification tag for blood
-Rh+ means Rh marker is present
-Rh- means Rh marker is not present
-Rh+ and Rh- should not be mixed
How do the circulatory, digestive and respiratory system work together to help respiration happen within body cells?
Digestive- Breaks down nutrients & allows them to diffuse into blood
Respiratory- Allows oxygen to get into blood at the alveoli and allow carbon dioxide to get out of the blood at the alveoli
Circulatory- The blood carries all of the nutrients and oxygen to the body cells so that the body cells can make energy (ATP). The blood also carries waste away from the cells.