What is a vertical plane through the body, dividing it into anterior and posterior regions called?

A. Vitamin D: Vitamin D is fat-soluble and is absorbed along with dietary fats. It is stored in the liver and adipose tissue and plays a key role in calcium and phosphorus regulation.

B. Vitamin C: Vitamin C is water-soluble, not fat-soluble. It dissolves in water, is not stored extensively in the body, and must be obtained regularly through the diet. Its main functions include collagen synthesis and antioxidant protection.

C. Vitamin E: Vitamin E is a fat-soluble antioxidant that protects cell membranes from oxidative damage. It is stored in adipose tissue and the liver for long-term use.

D. Vitamin A: Vitamin A is fat-soluble and essential for vision, immune function, and epithelial tissue health. It is stored in the liver and released as needed.

E. Vitamin K: Vitamin K is fat-soluble and plays a critical role in blood clotting and bone metabolism. It is absorbed with dietary fats and stored in the liver.

A. Urinary system: The urinary system, including the kidneys, ureters, bladder, and urethra, filters blood to remove metabolic waste, regulates fluid volume, controls electrolyte levels, and maintains acid-base balance. It also influences blood pressure through the renin-angiotensin-aldosterone system.

B. Cardiovascular: The cardiovascular system transports blood, nutrients, gases, and waste products throughout the body, but it does not directly eliminate waste or regulate electrolytes and acid-base balance.

C. Digestive system: The digestive system breaks down food, absorbs nutrients, and eliminates solid waste, but it does not play a primary role in regulating blood pressure or electrolyte balance.

D. Immune system: The immune system defends the body against pathogens and foreign substances but does not manage waste elimination, electrolyte balance, or blood pressure.