Science Ch 1D Study Guide

Lesson 1- How does your body take in oxygen About _____ of the air that you breathe in is a gas called _____. 1/5 oxygen As your cells _____, they make a gas called _____. This gas leaves your body as a waste when you _____. Work Carbon dioxide Breathe out

Lesson 1- How does your body take in oxygen The respiratory system includes your _____, your _____, and the _____ that connect them. Nose Lungs Tubes Air enters the body through the _____, which has the job of getting the air ready for the _____

Lesson 1- How does your body take in oxygen The nose’s lining makes a sticky liquid called _____ which adds _____ to the air. Mucus Moisture Mucus and tiny hairs inside the nose also _____ _____ from the air. Trap dust

Lesson 1- How does your body take in oxygen Another name for the windpipe is the _____, which divides into 2 _____ _____. Trachea Bronchial tubes When you breathe in, you _____. Inhale When you breathe out, you _____. Exhale

Lesson 1- How does your body take in oxygen Inhaled air, which is rich in _____, enters the air sacs. Oxygen An exchange of _____ and _____ takes place in the _____. Carbon dioxide Air sacs Now red blood cells have oxygen to deliver to _____ Body cells

Lesson 1- How does your body take in oxygen Carbon dioxide leaves your body when you _____. Exhale The large muscle below your lungs that allows you to breathe is the _____. Diaphragm

Lesson 2 – How does your body use oxygen When red blood cells are carrying oxygen, they are _____. Bright red After red blood cells give up their oxygen, they become dark, dull and _____. purplish

Lesson 2 – How does your body use oxygen Capillaries are tiny _____ with thin walls through which _____, _____, and _____ pass. Blood vessels Oxygen Nutrients Waste

Lesson 2 – How does your body use oxygen Capillaries are so narrow that _____ have to move through them in _____ _____. Red blood cells Single file Blood flows from the _____into blood vessels called _____, which carry the blood to your ____. Capillaries Veins Heart

Lesson 2 – How does your body use oxygen Almost all living things need _____ to stay alive as well as _____. Oxygen Food Your digestive system changes food into nourishing substances called _____. Nutrients Like red blood cells, nutrients are carried by _____. Plasma

Lesson 2 – How does your body use oxygen Cells use _____ to break the sugar down into _____ and _____. Oxygen Carbon dioxide Water When your cells break down sugar, they release _____. Energy All of the _____ that your body needs is made this way.

Lesson 2 – How does your body use oxygen Cells use energy to _____, to _____, and to _____. Grow Divide Repair damage

Lesson 3 – How does your body get rid of cell waste Your body gets rid of, or _____, cell waste. Excretes Your _____ does most of this work with some help from your _____ and _____. Excretory system Lungs Skin

Lesson 3 – How does your body get rid of cell waste Your body cells constantly produce _____. Cell wastes This waste moves through the thin walls of _____ and enters the _____ and is carried by the _____. Capillaries Blood Plasma

Lesson 3 – How does your body get rid of cell waste Carbon dioxide is _____ from the _____. Exhaled Lungs Nitrogen wastes are removed by the _____, the main organ of the _____. Kidneys Excretory system

Lesson 3 – How does your body get rid of cell waste Each kidney has about _____ tiny _____ that filter _____ from the _____. One million Tubes Waste Blood Your kidneys clean all of your _____ about _____ times every day. 40

Lesson 3 – How does your body get rid of cell waste These wastes form a liquid called _____. Urine It is temporarily stored in a baglike organ called the _____. Urinary bladder

Lesson 3 – How does your body get rid of cell waste The cleaned blood moves through _____ in the kidneys into _____ that carry it back to the _____ which pumps the cleaned _____ throughout the _____. Capillaries Veins Heart Blood Body

Lesson 3 – How does your body get rid of cell waste Even though your body needs water, it _____ some every day to prevent extra water from _____. Excretes Building up You excrete water when you _____, in your _____, and by _____. Exhale Urine Sweating

Lesson 3 – How does your body get rid of cell waste Water excretion helps your body keep a normal _____. temperature