: II. Select the correct option from the list and fill in the blanks:
superior vena cava, erythrocytes, transpiration, AB, thrombocytes, sphincter, live
1. Platelets are also known as

2. The blood group
is a universal recipient.
3,
is the largest blood vessel in the body.
4. A ring of a muscle called
surrounds the top of the urethra.
5.
converts amino acids into ammonia and urea.
6.
helps plants in keeping cool during summers.​