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Science - Unit 2 - Topic 7
Body Systems and Your Health
10
Science
8th Grade
03/12/2018

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Term
What percent of the blood is and what does it do.
Definition
55% carries nutrients, waste products, hormones, and blood cells
Term
What percent of the blood is red blood cells and what does it do.
Definition
44% carry oxygen
Term
What percent of the blood is white blood cells and what does it do.
Definition
less than 1% Defend the body against infection and disease which cause blood to clot
Term
What percent of the blood is platelets and what does it do.
Definition
less than 1% Heals wounds to prevent blood loss
Term
What is the blood pressure in relation to the volume of blood
Definition
A person loses a lot of blood from an injury which makes the pressure low
Term
What is the blood pressure in relation to the heart rate
Definition
A fast beating heart pushes blood throughout the body rapidly which makes the pressure high
Term
What is the blood pressure in relation to the artery size
Definition
Large open arteries allow large amounts of blood through which makes the pressure low. Small, partly closed arteries allow smaller amounts of blood through which makes the pressure high
Term
What is the blood pressure in relation to the artery elasticity
Definition
Flexible arteries that can easily expand let more blood pass which makes the pressure low. Hardening and loss of eleasticity makes the pressure high.
Term
What is the blood pressure in relation to the blood viscosity
Definition
(balance between red blood cells and plasma) : Thick blood flows less easily thsn that of thin blood which makes it high pressure and thin low pressure.
Term
What are two things smoking can do to your circulatory system?
Definition
Nicotine causes blood vessels to narrow which increases heart rate and raises blood pressure. Carbon monoxide that enters the lungs compete with oxygen which reduces the blood's ability to carry oxygen to cells.
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