The cytoplasm in a cell carries out a function similar to a function of which human system

Circulatory system

Explanation:

The cytoplasm is the clear, jelly-like fluid that fills the inside of a cell and surrounds all of the internal structures. It is made up of mostly water and salt. The cytoplasm stores molecules like enzymes used for cellular processes, as well as hosts many of these processes e.g glycolysis, protein synthesis etc. within the cell itself. It helps to move materials such as enzymes, hormones around the cell and dissolves cellular wastes.

The circulatory system is an organ system that allows blood to circulate and transport nutrients, hormones, enzymes to and fro the body.

The circulatory system of a humans is similar in function to the cytoplasm of a cell as it conveys oxygen, and other nutrients to cells and take away metabolic wastes. The heart, blood and blood vessels work together to perform this function. Also, the plasma (liquid part of the blood that holds the red blood cells and white blood cells) compares to the cytoplasm which holds the organnelles.

b tumor cells have a cell wall instead of a membrane

explanation:

tumor cells different from normal cells because tumor cells have a cell wall instead of a membrane.