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Human Body
| Term | Definition |
|---|---|
| Purpose of Digestive system | breakdown food particles and absorb nutrients and water |
| Importance of Digestive system | make food particles smaller so they can pass through cell membrane into cells |
| two types of digestion | mechanical and chemical |
| mechanical digestion | happens in the mouth and stomach - physically breaking up food - chew and contractions of stomach |
| chemical digestion | addition of digestive enzymes to break down food |
| protease breaks down what | protein |
| amylase breaks down what | starch |
| bile breaks down what | fat |
| Purpose of Respiratory System | gas exchange between body cells and environment |
| Importance of Respiratory System | oxygen from environment to cells and carbon dioxide from cells removed |
| Cillia | moves dust, particles and mucus out of the body - respiratory tract |
| Diaphragm | muscle that pulls lings downward when inhale and pushes up when exhaling |
| Oxygen | diffuses from lungs into blood |
| Carbon Dioxide | diffuses from blood to the lungs |
| Digestive organs | mouth, stomach, small intestines, large intestines, |
| Respiratory organs | lungs, bronchial tubes, |
| Purpose of Muscular system and Skeletal System | allow organism to move from place to place |
| Bones | provide structure, protection for vital organs, stores calcium and phosporus, produces red blood cells and white blood cells |
| Tendons | attach muscle to bone |
| ligaments | attach bone to bone |
| joints | where bones come together |
| how many bones in human body | 206 |
| Purpose of the Nervous System | control body functions by sending electric impulses along nerves |
| Importance of nervous system | regulate and coordinate functions of the body to respond to changes in the internal and external environment |
| stimuli | changes in the internal and external environment |
| What nerves are made of | neurons that use chemicals to send electrical impulses |
| Purpose of Excretory System | remove waste products both liquid and gas |
| Importance of Excretory System | waste can be toxic or deadly |
| what does skin remove | sweat made up of water, salt and urea |
| What does lungs remove | carbon dioxide and water |
| What does live remove | toxins such as alcohol and drugs |
| Organs of nervous system | brain, spinal cord, nerves |
| What does kidneys remove | liquid |
| Purpose of Circulatory System | brings nutrients and oxygen to the cells and wastes to the respiratory and excretory systems, carries hormones and antibodies |
| Arteries | carry blood away from the heart |
| Veins | carry blood to the heart |
| Cappilaries | smallest blood vessels - where materials are exchanged between blood and cells. |
| Plasma | liquid part of blood carries dissolved materials |
| Platlets | clot the blood |
| Red Blood cells | carry oxygen and carbon dioxide |
| White Blood cells | destroy bacteria, viruses, and foreign cells using antibodies |
| Importance of Immune System | fight and cure diseases caused by pathogens |
| pathogens | viruses, bacteria, fungi and parasites that cause disease |
| antigens | protein markers on the surface of cells |
| phagocytosis | white blood cells that engulf a pathogen and destroys it |
| vaccine | injection of dead or weak pathogen to promote immunity |
| How does vaccine work | exposes body to foreign antigens, body creates antibodies to fight the antigen |
| Purpose of Endocrine System | initiate and control body functions using hormones |
| hormones | chemical signals that travel from organ to target cells using blood stream |
| receptor cell | cells that have receptors on their cell membranes fit only one specific hormone |
| Importance of Endocrine System | helps body regulate and coordinate functions of body |
| homeostasis | keeping the body working like it is supposed to work |
| allergy | immune issue - overreaction to normal substances |
| rejection | immune issue - body identifies a transplanted organ and attacks it |
| AIDS | immune issue - caused by HIV - attacks and destroys white blood cells |
| organelle that matches digestive system | lysosome |
| organelle that matches respiratory system | cell membrane |
| organelle that matches circulatory system | cytoplasm |
| organelle that matches excretory system | cell membrane |
| Inherited disorder causes what disease | sickle cell disease, down syndrom, systic fibrosis |
| Exposure to toxins causes what disease | led poisoning, radiation poisoning |
| Pathogens causes what disease | strep throat, athletes food, flu |
| Poor Nutrition causes what disease | Sun - vitamin C deficiency goiter - iodine deficiency |
| Organ Failure causes what disease | heart attack, diabetes |
| Poor LIfe-Style Choices causes what disease | lung cancer, drug addition, skin cancer |