Unit 3: Human Body Systems

The skin MAINLY protects the body against infection by

• secreting sweat.

• serving as a barrier

• producing antibodies

• stimulating mast cells.

The human respiratory system consists of various organs that work together to accomplish the vital task of bringing oxygen into the body. One organ listed is part of a system that helps with digestion rather than respiration. The organ that is incorrectly paired with a respiratory function is the

• nose - filters and warms air

• bronchi - moves air into the lungs

• diaphragm - muscle that powers breathing

• esophagus - moves air from the nose into the lungs

This organ is the primary organ of the integumentary system. It protects, regulates, and prevents water loss. It is your

• Brain

• Kidneys

• Skeletal

• Skin

Which level of organization is the HIGHEST?

• Cell

• Organ

• Tissue

• Organ System

An organ, in any multi cellular organism, would BEST be described as

• several types of cells working together for a common purpose.

• a group of the same kind of cells with a common structure and function.

• a structure containing a single cell that is part of a large system.

• a structure made of two or more tissues functioning together for a common purpose.

Tags

NGSS.MS-LS1-3

Your kidneys, the main organ of the excretory system (and urinary), work with the __________ system, to filter liquid waste from your blood.

• Circulatory

• Digestive

• Immune

• Nervous

Tags

NGSS.MS-LS1-3

The major organ of the circulatory system, the heart

• removes bodily waste.

• pumps blood throughout the body.

• carries oxygen throughout the body.

• transmits impulses throughout the body.

In order for humans to move, the skeletal system must work together with the ___________ system.

• Nervous

• Muscular

• Circulatory

• Immune

The __________ system works with the nervous system to protect important organs such as the brain and spinal cord.

• Immune

• Muscular

• Skeletal

• Digestive

The human body is capable of movement because the muscular and skeletal systems work closely together. Of the pairs of human body systems listed, which two are MOST closely linked in function?

• digestive - skeletal

• excretory - endocrine

• reproductive - muscular

• respiratory - circulatory