B - The tubes that branch off from the trachea and carry air into the lungs.

(a)  

C - Tiny blood vessels where the exchange of oxygen and nutrients takes place between the blood and body tissues.

(a)  

D - The process of breaking down food into smaller components for absorption.

(a)  

E - The removal of waste products from the body.

(a)  

F - The process of removing impurities or waste from a fluid, such as blood filtration in the kidneys.

(a)  

G - An organ that stores bile produced by the liver until it is needed for digestion.

(a)  

H - The muscular organ that pumps blood throughout the circulatory system.

(a)  

I - The process of breathing in air into the lungs.

(a)  

J - The liquid obtained from or present in fruit or vegetables. We also call this way to the secretions of the stomach, the liver the pancreas and the intestines.

(a)  

K - Organs that filter blood, removing waste products and excess fluids to form urine.

(a)  

L - Organs responsible for gas exchange, where oxygen is taken in and carbon dioxide is expelled.

(a)  

M - A slimy substance produced by mucous membranes that helps protect and lubricate the respiratory and digestive tracts.

(a)  

N - Substances in food that provide nourishment and energy for growth and health.

(a)  

O - A gas essential for respiration and energy production in cells.

(a)  

P - An organ that produces digestive enzymes and regulates blood sugar.

(a)  

Q - In Spanish, name of the product of the digestion in the stomach.

(a)  

R - Blood cells that contain hemoglobin and carry oxygen to tissues.

(a)  

S - The part of the digestive system where most nutrient absorption takes place.

(a)  

T - The windpipe; the tube that connects the larynx to the bronchi and allows air to pass to and from the lungs.

(a)  

U - The tube that carries urine from the bladder to the outside of the body.

(a)  

V - Blood vessels that carry deoxygenated blood back to the heart from the body.

(a)  

W - Another term for the trachea, the tube that allows air to pass to and from the lungs.

(a)  

X - It contains X, a colourless, odourless gas produced by burning carbon and organic compounds and by respiration. It is absorbed by plants in photosynthesis.

(a)  

Y - It contains Y, part of the respiratory system containing vocal cords, involved in speech.

(a)  

Z - An essential mineral involved in various physiological processes, including immune function and wound healing.

(a)