Human respiratory & circulatory system Flashcards
What 5 things make up the circulatory system?
Lungs, Heart, Veins, Arteries and Capillaries
How many chambers does the heart have?
4
What is the largest artery in the heart?
Aorta
What is the correct name for the chest?
Thorax
What do veins carry to the heart?
CO2
What to arteries carry to the heart/body?
Oxygen rich blood
What do PULMONARY Arteries carry?
Deoxygenated Blood
What do PULMONARY Veins carry?
Oxygenated blood
Which side of the heart is oxygen rich?
Left
Which side of the heart is not oxygen rich?
Right
Why is the left lung smaller than the right lung?
To allow room for the heart
What is the first part of the respiratory system?
Nose & Mouth
(Entrance for oxygen, exit for CO2)
How does the Trachea protect us from pathogens?
Mucus lining catches pathogens before they reach the lungs
What does air pass through to reach the lungs?
Bronchus
- Turn for direction of Oxygen travel to lungs -
Oxygen -> Trachea -> pass mucus lining -> pass Bronchus -> through Bronchiole -> pass Ducts -> Alveoli Ducts -> enter Individual Alveoli -> gas changes -> back up Trachea, Exhale
What stops food going into the Trachea?
Flap in the Epiglottis
How thick (in cells) are Alveoli?
1 cell thick
What connects the heart and lungs?
Pulmonary arteries and Pulmonary veins
How might an Arterial cut look?
Bright red, may squirt out of wound
How may a Veinus bleed look?
Dark red, ooze from wound
How many litres of blood does the body have?
5 Litres
What is a normal blood pressure?
(Systolic number) –> 120/80 <– (Dystolic number)
What does a Systolic number represent?
Blood LEAVING the heart
What does a Dystolic number represent?
Blood ENTERING the heart
What artery supplied blood to the head and neck?
Carotid Artery
Which vein takes blood from the head and neck, back to the heart?
Jugular vein
What is the scientific name for Red blood cells?
Erythrocytes
Which “Cytes” help with blood clotting?
Thrombocytes
