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7th Science Part 1

Chapter 3- Your Wonderful Body- A Beka Book- Science Order and Design Malia N.

Anatomists Scientists who study anatomy
Anatomy The study of an organism's shape and structure
What parts of a human being are the most important and are not physical and cannot be explained by scientific laws? Soul and spirit
What are the three main divisions of your body? Head, trunk, and appendages
Trunk Contains most of the body's most vital organs
Appendages Arms and legs
No part of the body can exist _____________. Independently. God said this in His Word.
System The highest and most obvious level of organization within your body.
Organ A group of tissues specifically arranged to perform a definite function(s)
Tissues Made up of still smaller units called cells
Cells Not the smallest units of matter, but they are the smallest units of living things
To survive, your body's cells must have ____, _____, ______ supplied, and ______ removed. food, water, oxygen, wastes
Cardiovascular system Has the job of "pickup and delivery"
Which word describes the body parts through which blood travels? Cardiovascular. Cardio refers to the heart, and vascular refers to the blood vessels.
Plasma Over 50% of your blood consists of this straw-colored liquid
Red blood cells Transport oxygen to the other cells of the body on special proteins called hemoglobin; millions of these in one drop of blood.
Hemoglobin Special protiens
Platelets Cell pieces that form clots and seal up cuts
Heart Your blood moves through your body by the pumping action of this
Arteries Large blood vessels that carry blood away from the heart and they branch into smaller vessels called arterioles.
Arterioles Branch into vast networks of still smaller cells called capillaries
Capillaries Are next to your body's cells
Deffusion The mixing of gas or liquid molecules by random molecular motion
Venules Similar to arterioles. However, they carry blood from capillary networks to veins.
Veins Large blood vessels that carry blood back to the heart.
Atrium Upper chamber of the heart
Ventricle Lower chamber of the heart
Pericardium A tough slippery membrane that encloses the heart allowing the chambers to contract and relax without rubbing against the surrounding tissues
Pulmonary Circulation Transports the blood back and forth between the lungs and heart
Coronary circulation The blood flow to the heart
Systemic circulation The flow of blood between the heart and the rest of the body
Respiratory system It's major
Nasal cavity Air entering the respiratory system generally travels first into this, where it is warmed, moistened, and filtered
Mucous membrane Lines the nasal cavity and secretes sticky mus that traps dust particles and other foreign substances found in the air
Pharnyx Throat
Larnyx Voice box
Trachea Windpipe
Bronchi Allows air to enter the two lungs
Lungs located in your chest ar spongy organs of the respiratory system
Thoracic cavity Your chest
Pleura A thin, slippery membrane which is held by a lubrication liquid against the pleural membrane (The membrane up against the thoracic cavity wall)
Diaphragm A muscle that helps you breathe by contracting to create more space in your thoracic cavity
Digestive system Breaks down the food you eat, allowing the food to be absorbed by the blood and used throughout your body as a source of energy
A you eat and digest food your digestive system acts ____________ and __________ upon the food tho break it down inopt molecules that can be absorbed into the blood mechanically, chemically
Alimentary canal The path food follows through the digestive system
Mouth Chews the food and mixes it with saliva
Saliva Contains special enzymes that break down strach form food into sugar.
Enzymes Molecules designed to make chemical reactions occur very rapidly
Teeth Critical for digestion
Crown The visible part of a tooth
Enamel The hardest substance in the body
Root The part of the tooth that is not covered by enamel
Dentin A hard, bone-like tissue which forms and shapes the tooth
Cementum A thin, bone-like covering over the root which holds the root firmly in its socket
Periodontal membrance Connects the cementum to the jawbone
Esophagus A long, muscular tube that connects your mouth to your stomach
Peristalsis The involuntary contraction of muscles in the esophagus that pushes the food toward you stomach
Epiglotttis A trapdoor that keeps food from entering the trachea. Normally, the epiglottis is open to allow you to breathe.
When you _______, the epiglottis ______ over the trachea so that food goes into your ________ and not into your _________ system. Swallow, closes, esophagus, respiratory
Stomach A muscular organ that acts as a storage and mixing chamber
Small intestine The organ where most chemical digestion and food absorption occurs
Duodenum The first ten inches of the small intestine where food is mixed with digestive secretions from the intestinal wall, pabcreas, and liver
Villi A large number of hair-like tubes that cover the inside walls of all three sections of the small intestine
Liver The body's largest internal organ, works in several systems, but its two main functions help the digestive system
Bile A yellowish-greenish liquid that the liver produces that is mixed with food in the small intestine to help digest fat
Gallbladder The liver stores bile in this sack-like organ, which is located beneath the liver
Pancreas Located beneath the stomach, produces pancreatic juice that is sent into the small intestine
Colon Large intestine
Rectum A short section at the end of the colon
Feces A fancy word for pody
Name the three main functions of the liver. 1. Produce bile 2. Filter out certain poisonous substances 3. Stores the bloods excess glucose
Created by: nelsonclan