Unit 3 Review (7th Grade)

The nervous system produces energy for cells by breaking down glucose.

The respiratory system stores nutrients for growth and repair of cells.

The circulatory system delivers oxygen to cells, which helps them function and supports overall body systems.

The digestive system eliminates waste from the bloodstream after filtering cells.

The digestive system absorbs proteins used to attack viruses.

The nervous system releases hormones that directly kill pathogens.

The muscular system increases circulation to prevent disease.

The immune system relies on white blood cells produced by the bone marrow to fight infections.

Oxygen from the lungs is transported by blood to various cells.

Signals from the brain trigger muscle contractions for movement.

The kidneys remove waste from the blood, balancing bodily fluids.

Nutrients absorbed in the intestines are sent to the liver for processing.

Cells in the skin regulate body temperature.

Cells in the eyes convert light into nerve signals.

Cells in the stomach lining produce enzymes that break down food.

Cells in the lungs exchange carbon dioxide for oxygen.

The nervous system releases enzymes to break down food faster.

The nervous system filters waste from the bloodstream for excretion.

The nervous system sends signals to muscles to move away from danger.

The nervous system absorbs excess nutrients to store energy.

The endocrine system filters oxygen into cells from the lungs.

The endocrine system supplies nutrients to cells for energy.

The endocrine system releases insulin to help cells absorb glucose from the blood.

The endocrine system produces antibodies to fight infections.

Muscles generate heat to warm up bones and prevent injury.

Bones produce enzymes that accelerate muscle growth.

Bones release calcium to fuel muscle contractions during exercise.

Muscles contract and pull on bones, allowing limbs to move.

The respiratory system filters waste from the blood to aid cell function.

The respiratory system supplies oxygen to the blood, which cells use for energy production.

The respiratory system produces hormones that enable energy storage in cells.

The respiratory system transports carbohydrates to cells for energy.

The stomach acids break down food into usable forms for cells.

The liver converts excess glucose into glycogen stored in cells.

The skin absorbs nutrients to nourish cells beneath the surface.

The kidneys filter waste from the blood and regulate water balance, ensuring proper cell function.

The immune system enhances skin elasticity to prevent tears from pathogens.

The integumentary system transports antibodies through the bloodstream.

The skin acts as a barrier, and immune cells respond to breaches by pathogens.

The skin secretes enzymes to digest harmful bacteria externally.

Blood cells provide oxygen to muscle cells, which then help in digestion.

Skin cells protect the body but do not interact with internal tissues.

Muscle cells contract to create movement, and this movement is controlled by nerve cells sending signals.

Nerve cells only transmit signals without needing interaction with other cells.

The respiratory system pumps blood, while the circulatory system regulates heart rate.

The respiratory system digests food, and the circulatory system processes nutrients from it.

The respiratory system brings in oxygen and expels carbon dioxide, while the circulatory system transports these gases to and from cells.

The respiratory system controls muscle movement, while the circulatory system provides energy for these movements.

Each cell type functions independently, without forming tissues or organs.

Groups of cells directly form organ systems without forming tissues.

Cells randomly float within the body, performing various unrelated tasks.

Groups of cells with specialized functions form tissues, which work together to create an organ system.

Muscle cells generate electrical signals that neurons use to regulate blood flow.

Neurons protect muscle cells from external damage, enhancing their strength.

Neurons transmit signals that prompt muscle cells to contract, leading to movement.

Neurons store nutrients for muscle cells, providing them with energy when needed.

The circulatory system breaks down food into smaller molecules for digestion.

The digestive system provides oxygen to the circulatory system for distribution.

The digestive system breaks down food into nutrients, which are then absorbed into the bloodstream by the circulatory system.

The digestive system uses blood cells to transport waste material to the intestines.