Excretory system

Lesson 5

Circulatory system

Lesson 4

1. a) Cover the right column and read the English words. Translate them into Russian and check your translation.

b) Cover the left column and translate the Russian words back into English.

atrium sinus ventricle sac aorta throughout

атриум, предсердие пазуха желудочек (сердца, мозга) мешочек, сумка аорта через; по всему

2. Read the words and put down their Russian equivalents:

a large blood vessel __________________________________

a two-chambered heart ________________________________

a one-way compartment _______________________________

the fish's veins _______________________________________

the rest of the body ____________________________________

a single loop _________________________________________

3. Master the following words.

circulatory system - система кровообращения

pump – 1. сердце Syn: heart 2. накачивание, выкачивание, откачивание (процесс действия насоса) 3. 1) а) работать насосом; качать б) выкачивать; опорожнять

despite - несмотря на, вопреки чему-л.

thin-walled - тонкостенный; с тонкой оболочкой

4. Put down the English for:

замкнутая кровеносная система

по всему телу

толстостенный

жабры рыбы

все еще

5. Translate the following words and word combinations in writing.

closed circulatory system ___________________________________

pumps blood _____________________________________

the sinus venosus ____________________________________________

muscular chamber __________________________________________

a thin-walled sac ________________________________________

bulbus arteriosus ________________________________________

6. Read and translate the text.

Fish have a closed circulatory system with a heart that pumps the blood in a single loop throughout the body. The blood goes from the heart to gills, from the gills to the rest of the body, and then back to the heart. In most fish, the heart consists of four parts: the sinus venosus, the atrium, the ventricle, and the bulbus arteriosus. Despite consisting of four parts, the fish heart is still a two-chambered heart. The sinus venosus is a thin-walled sac that collects blood from the fish's veins before allowing it to flow to the atrium, which is a large muscular chamber. The atrium serves as a one-way compartment for blood to flow into the ventricle. The ventricle is a thick-walled, muscular chamber and it does the actual pumping for the heart. It pumps blood to a large tube called the bulbus arteriosus. At the front end, the bulbus arteriosus connects to a large blood vessel called the aorta, through which blood flows to the fish's gills.

7. Finish the following sentences.

1. Fish have a ….

2. The blood goes from ….

3. The heart consists of ….

4. The sinus venosus is a ….

5. The atrium is a ….

6. The ventricle is a ….

7. The aorta is a ….

8. Pair work. Have a talk on advantages and disadvantages of a closed circulatory system.

1. Read the words.

nitrogenous

ammonia

osmosis

urine

concentrate

amount

2. a) Cover the right column and read the English words. Translate them into Russian and check your translation.

b) Cover the left column and translate the Russian words back into English.

nitrogenous ammonia diffuse osmosis urine

азотистый, азотный аммиак диффундировать осмос моча

3. Give Russian equivalents for the following words and word combinations:

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