HSC Biology — Module 2
Organ Systems — Flashcards & Quiz
HSC Biology Module 2 frames multicellular life as a hierarchy: cells → tissues → organs → organ systems → organism. You need to explain how systems (circulatory, respiratory, digestive, excretory, nervous, endocrine) cooperate to maintain the whole organism, and compare the challenges of multicellularity against unicellular simplicity. Examiners reward structured comparisons that name specific organs and link them to their functional role.
Sample Flashcards
Q1: Describe the relationship between the digestive and circulatory systems.
The digestive system breaks food into nutrients (mechanical and chemical digestion). These nutrients are absorbed into the bloodstream via the small intestine and transported by the circulatory system to all body cells.
Q2: What is homeostasis and why is it important?
Homeostasis is the maintenance of a stable internal environment despite changes in external conditions. It is essential for enzyme function, cell survival and efficient metabolism. Involves stimulus-receptor-control centre-effector-response.
Sample Quiz Questions
Q1: Homeostasis is the process of maintaining a changing internal environment.
Answer: FALSE
Homeostasis is the maintenance of a STABLE (relatively constant) internal environment, not a changing one.
Q2: Nutrients absorbed by the digestive system are transported to body cells by the circulatory system.
Answer: TRUE
The digestive system breaks down food and absorbs nutrients into the blood. The circulatory system then transports these nutrients to all body cells.
Related Concepts
Last updated: March 2026 · 2 flashcards · 2 quiz questions