Human body

• components of blood: plasma (54%), red blood cells (45%), white blood cells and platelets (1%)
• plasma is a clear, yellowish liquid that transports substances around the body
• red blood cells contain haemoglobin which carries oxygen; helps transport oxygen
• white blood cells are the most abundant cells in the blood and are responsible for fighting infection
• platelets are old blood fragments that clot the blood to stop bleeding
• diffusion is when particles move from an area of high concentration to low concentration
• blood pressure is the force that your blood exerts against your arteries as it is pumped throughout your body
• the circulatory system is made up of the heart, vessels, and blood
• pulmonary circuit: carries deoxygenated blood from the heart to the lungs where is it reoxygenated which then flows back to the heart
• systemic circuit: carries oxygenated blood from the heart to the rest of the body and flows back to the heart once the blood is deoxygenated
• the flow of blood in the heart is: superior/inferior vena cava, right atrium, tricuspid valve, right ventricle, pulmonary valve, pulmonary arteries, lungs, pulmonary veins, left atrium, mitral valve, left ventricle, aortic valve, aorta
• mrs gren: movement, respiration, sensitivity, growth, reproduction, excretion, nutrition
• movement: ability to move from one place to another
• growth: increase in size or mass
• sensitivity: ability to sense changes in the environment and respond accordingly
• respiration: conversion of energy from carbs and fats into energy that can be used by all cells (in the form of ATP)
• reproduction: production of offspring
• excretion: removal of waste products
• nutrition: taking in food and using it as fuel
• circulatory system: transports materials throughout the body