Read the following statements regarding the human circulatory system.
A . The systemic circulation provides nutrients , oxygen, and other essential substances to all the tissues including the lungs.
B. A unique vascular connection exists between the digestive tract and the liver is called the hepatic portal system.

Consider the following four statements (i)-(iv) and select the correct option (i) Fish heart contains only oxygenated blood (ii) Closure of A-V valves produces the second heart sound (iii) The vascular connection between the digestive track and kidney is called hepatic portal system (iv) Purkinje fibres are nerve fibres present in the heart wall.

Consider the following four statements (i)-(iv) and select the correct option (i) Fish heart contains only oxygenated blood (ii) Closure of A-V valves produces the second heart sound (iii) The vascular connection between the digestive track and kidney is called hepatic portal system (iv) Purkinje fibres are nerve fibres present in the heart wall.

A unique vascular connection that exists between the digestive tract and liver is called hepatic portal system. Select the blood vessel that brings deoxygenated but nutrient blood from intestine to liver?

A unique vascular connection that exists between the digestive tract and liver is called hepatic portal system. Select the blood vessel that brings deoxygenated but nutrient blood from intestine to liver?

Which one of the following statements is correct about the human circulatory system? (A) Blood transports only oxygen and not carbon dioxide. (B) Human heart has five chambers. (C) Valves ensure that the blood does not flow backwards. (D) Both oxygen-rich and oxygen-deficient blood gets mixed in the heart.

Which one of the following statements is correct about the human circulatory system? (A) Blood transports only oxygen and not carbon dioxide. (B) Human heart has five chambers. (C) Valves ensure that the blood does not flow backwards. (D) Both oxygen-rich and oxygen-deficient blood gets mixed in the heart.

Read the following statements and find out the incorrect statement(s). a. Human are sexually reporducing and viviparous. b. Transfer of sperm in female genital tract (vagina ) is called ejaculation. c. There are remarkable differences between the reproductive events in the male and in the female. d. Sperm formation continues even in old men, but formation of ovum ceases in women around the age of fifteen years. e. The male and female reproductive systems are located in the pelvic region.