Answer:The circulatory system consists of your heart and blood vessels. The heart’s job is to pump blood throughout your body.
The left side of the heart takes oxygen-rich blood from the lungs and pumps it to other parts of the body to use. The right side of the heart pumps blood to the lungs to add oxygen to it.
The heart has a very busy job! When you are resting, your heart pumps between 60-100 times each minute. When you are exercising, it pumps much faster to deliver blood to your muscles.
The heart is responsible for getting the oxygen to your muscles, but it is the respiratory system’s job to provide the oxygen. This means that the circulatory system is directly linked to the respiratory system.
The respiratory system gathers oxygen and removes carbon dioxide.
simple diagram of the lungs and respiratory system for kids
The main part of the respiratory system is the lungs. It is the lungs’ job to bring air into and out of the body. Oxygen from the air you inhale moves through small blood vessels and enters the bloodstream. It then hitches a ride on red blood cells and travels to all parts of the body.
The blood coming back to the lungs contains carbon dioxide. When you exhale, you remove carbon dioxide which your body does not need anymore.
The digestive system breaks down food to release nutrients.
simple diagram of the digestive system for kids
Digestion begins when we break food down into little pieces in our mouth with the help of teeth, the tongue and saliva.
After that, food travels down the esophagus and into the stomach, where it’s further broken down by stomach acids.
From the stomach, it heads to the small intestine. Here, your body removes nutrients it needs from food, and sends the nutrients to parts of the body through the circulatory system.
Finally, the digested food is sent to the large intestine, out of your body… and beyond!
RESPIRATORY SYSTEM
PRIMARY PURPOSE: Breathing - taking in Oxygen, pushing out Carbon-Dioxide (CO2)
PRIMARY ORGANS: Lungs, trachea (tube going from lungs to nose/mouth)
(1) Inhales (breathes in) Oxygen - good for the body - gives it to the Circulatory System to be transported
throughout the body through the blood.
(2) Exhales (breathes out) Carbon-Dioxide (CO2) - lungs get this gas from the blood (Circ. Sys.) and pushes it out of the body
NERVOUS SYSTEM
PRIMARY PURPOSE: Control Center: transports messages to/from the Brain!
PRIMARY ORGANS: Brain, nerves, neurons, spinal cord (main connection coming out of the brain to the rest
of the body’s nerves)
(1) Sends messages to the entire body from the Brain.
(a) Involuntary messages/signals tell the body parts to do regular actions for body to work; We don’t think
about these actions; like breathing, heart-pumping, digestion, etc
(b) Voluntary messages/signals tell the body parts to do something particular; We think about these
actions; LIKE: We decide to raise our arms; We choose words to speak; We choose to look in a certain
direction; etc.
(2) Receives messages from the 5 senses (hearing, touch, taste, seeing, smelling) takes those to the Brain and
the brain processes the new information - and how to react if necessary.
Immune System
The body needs to defend itself against germs and infection. The immune system is the body’s shield against unfamiliar things like viruses and parasites. When the immune system detects something foreign, it will attack it to protect the body. For example, if bacteria get into your body through your mouth, the immune system would send white blood cells to kill the invading germs. Sometimes the white blood cells win and you don’t get sick. Other times, the white blood cells aren’t able to stop an illness and you will get sick. If this happens, the white blood cells will keep fighting until you are well again.
Excretory System
As the body performs its various functions, it creates waste products that have to be removed. The body has to have a way to remove both liquid and solid waste to stay healthy. The kidneys are in charge of keeping the right balance of fluids and salt in the body. After filtering, the kidneys move waste fluids out of the body as urine. The excretory system also removes waste when you breathe out and when you sweat. Defecation is the way the body removes solid waste.
The Excretory System (PDF): The excretory system helps maintain the proper balance of water and salts in the body.
Human Excretory System (PDF): The excretory system is responsible for removing wastes from the body using organs including the kidneys and the liver.
Excretory (Urinary) System (PDF): Liquid waste leaves the body through the urinary system, which includes the kidneys, bladder, and urethra.
Step-by-step explanation:
trust