Digestive System
What is most of the digestive system formed by?
The digestive tract
What is the main organ for the circulatory system?
The heart
What are the three processes that form breathing?
Inhalation, exchange of gases, exhalation
What are the two liquids that the excretory system takes out of the body?
Urine and sweat
Where does digestion start?
In the mouth
What is blood made up of?
Plasma, red blood cells, white blood cells, and platelets
What are the two main parts of the respiratory system?
The respiratory tract and the lungs
What are the main organs responsible for removing waste from the blood?
The kidneys
Name three organs in the digestive tract.
Mouth, Oesophagus, Stomach, Small intestine, Large intestine, Anus
What are the names of the blood vessels and what are their functions?
Arteries: carry blood away from the heart around the body
Veins: carry blood towards the heart
Capillaries: connect the veins and arteries and allow different nutrients to pass into cells
Where does the exchange of gases take place?
The alveoli
What are the two functions of the sweat glands?
Regulating body temperature and filtering out waste from the blood
Name the two of the three organs in the digestive system that are not part of the digestive tract
Salivary glands, liver, pancreas
What are the names of the chambers of the heart and what are the two parts of a heartbeat?
Chambers: atrium and ventricle
Heartbeat parts: Diastole and systole
What gas do we inhale and what do we exhale?
We inhale oxygen and exhale carbon dioxide
What other parts of the excretory system help to remove urine?
Ureters, bladder and urethra
Describe how the process of digestion occurs in either the stomach, small intestine, or large intestine
Stomach: stomach juices mix with the bolus to break down the nutrients in food and form a substance called chyme.
Small intestine: the chyme mixes with pancreatic juice and bile from the liver to form a substance called chyle. Nutrients are absorbed from the chyle into the bloodstream.
Large intestine: Water is absorbed from the undigested food and faeces are formed
Describe the function of two of the parts of blood.
Plasma: liquid that contains nutrients, water and waste
Red blood cells: have a red substance called haemoglobin that can transport oxygen and carbon dioxide
White blood cells: protect the body from infection
Platelets: stick together to stop bleeding
What organs make up the respiratory tract?
Mouth, Nasal cavity, pharynx, larynx, trachea, bronchi, bronchioles, alveoli
How do the kidneys remove waste from the blood?
The renal artieries carry waste into the kidneys, which have tiny tubes that filter the blood. The clean blood leaves through the renal veins