Hola! Happy Thursday everyone 🙂
Last week’s questions and answers:
Draw and label the different parts of the heart. You can use your book to complete the homework. (Dibuja y etiqueta las diferentes partes del corazón. Puedes usar el libro. Completar en inglés).
When cells carry out their functions, they produce waste products that pass into the blood. These substances are toxic and must be eliminated.
Excretion is the elimination of waste products from the blood:
- In the lungs, carbon dioxide is eliminated through respiration.
- The excretory system produces and expels urine.
The Excretory System
The excretory system consists of the kidneys, the ureters, the bladder, and the urethra. It is responsible for producing, storing, and excreting urine.
Blood reaches the kidneys through two arteries that come from the aorta. The kidneys continuously filter the blood. They retain waste products and water that form urine.
The ureters are two channels that carry urine from the kidneys to the bladder.
The bladder is the organ where urine is stored. When the urine reaches a certain volume it is expelled from the body. The walls of the bladder expand and contract depending on the amount of urine it contains.
Urine leaves the body through the urethra.
Tarea para esta semana:
Question 1: What is the process of excretion?
Question 2: What are the different parts of the excretory system?
Vocabulary: waste products, excretion, excretory system, lungs, kidneys, ureters, bladder, urethra