Question

A student builds a model of the circulatory system that also compares blood chemistry at different points in the system. This study most strongly focuses on which characteristic of living organisms?

A. responding to stimuli
B. growing and developing
C. changing over time
D. homeostasis

Answer 1

The study of the circulatory system and blood chemistry at different points in the system most strongly focuses on **D. homeostasis**. Homeostasis refers to the ability of an organism to maintain stable internal conditions, such as temperature, pH, and chemical concentrations, despite external changes. The circulatory system plays a critical role in transporting nutrients, gases, and waste products, thus helping to regulate the internal environment of the body.