NUTRITION 5,6,7 and 8
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Define: Digestive System
The digestive system takes in and breaks down foods and its nutrients so they can be absorbed by cells
Define: Digestion
Digestion is the mechanical and chemical process by which foods are converted into nutrients that can be absorbed by cells
Digestive glands are structures that secrete…
Digestive juices Digestive juices contain enzymes that act chemically to break down compl
List the 5 Digestive Glands
1.Salivary Glands 2.Gastric Glands 3.Intestinal Glands 4.Pancreas 5.Liver
Say where they are found and what they secrete Salivary Glands
Found in mouth, secretes saliva
Say where they are found and what they secrete Gastric Glands
Found in stomach, secrete gastric juice
Say where they are found and what they secrete Intestinal Glands
Found in intestine, secrete intestinal juice
Say where they are found and what they secrete Pancreas
Found in duodenum, secrete pancreatic juice
Say where they are found and what they secrete Liver
Found in liver, secrete bile
Define Intestinal Absorption
Intestinal absorption is the process through which nutrients are absorbed into the bloodstream through the lining of the intestines
What substances do the Small/Large Intestine absorb
Small Intestine absorbs organic nutrients,minerals and water Large intestine absorbs minerals, water and some vitamins
Define: Respiratory System
The Respiratory System obtains O2 from the air to the blood and releases Co2
Define: Respiration
Respiration is the process by which O2 in the air is transferred to the blood and Co2 is released to the air
Define: Circulatory System
The Circulatory System is in charge of transporting nutrients to all the cells in the body and removing their metabollic waster
What 2 elements is blood made of?
Blood plasma and Blood cells
Define Blood Plasma
Blood plasma is a yellowish aqueous solution that contains nutrients and waste products, but no O2
Name the 3 types of blood cells
1.Red Blood Cells (ERYTHROCYTES) 2.White Blood Cells (LEUKOCYTES) 3.Platelets (THROMBOCYTES)
What is the function of the red blood cells (erythrocytes) ? They…
They transport O2 thanks to the iron- rich protein hemoglobin, this is also why blood is red
What is the function of white blood cells (leukocytes) ? They…
They response to infections
What is the function of platelets (thrombocytes) ? They…
They stop bleeding, blood clotting
Where are blood cells originally produced?
Bone Marrow
What are the 3 types of vessels?
Arteries, Veins and Capillaries
Say the function for each of the 3 vessels
• Arteries carry O2 from the heart to the body • Veins carry Co2 from the body to the heart • Capillaries act as roots for the exchange of substances
Define: Heart
The heart is a muscular organ that mantains the circulation of blood by pumping it