Efficient blood circulation ensures the delivery of oxygen and nutrients to all cells while removing waste products. This process supports cellular metabolism, energy production, and overall physiological functions, contributing to the body’s health and homeostasis.

Blood carries oxygen and nutrients to all cells while collecting waste products such as carbon dioxide and metabolic by-products. These wastes are transported to organs like the liver and kidneys for disposal.

Mitochondria, which are organelles responsible for producing energy in cells, utilize oxygen during cellular respiration. Therefore, the oxygen transported by the blood to body cells is essential for mitochondrial function and energy production.

Secondary meristem, located in the cortex of the plant, contributes to the formation of cork cells by generating layers of cells that constitute the cork, thus aiding in the development of the protective outer layer as the plant grows older. ...

Cork cells are dead and lack intercellular spaces, unlike most living plant cells. Additionally, they contain suberin in their cell walls, which adds to their impermeability.

Oxygen is absorbed in the lungs and then transported to all body cells through the bloodstream.

Muscle cells contract and relax, facilitating the movement of body parts such as the chest during breathing.

Living phloem cells, such as sieve tubes, companion cells, and phloem parenchyma, are essential for maintaining the metabolic processes involved in the transport of food throughout the plant. This ensures efficient distribution of nutrients to support growth, development, and energy ...

Sieve tubes in phloem are tubular cells with perforated walls, allowing for the transport of food materials like sugars from the leaves to other parts of the plant.

Tracheids and vessels have thick walls and are often dead cells when mature, whereas xylem parenchyma functions in storing food, and xylem fibers primarily provide support to the plant.