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Temperature regulation in the body is primarily managed by the hypothalamus in the brain. It detects changes in body temperature and triggers responses such as sweating to cool down the body or shivering to generate heat. Additionally, blood flow to the skin is adjusted to either retain or release heat, maintaining homeostasis. Related Questions: What … Read more
The respiratory and cardiovascular systems work together to supply oxygen to the body and remove carbon dioxide. The respiratory system brings oxygen into the lungs, where it diffuses into the bloodstream. The cardiovascular system then transports oxygenated blood to the tissues and returns deoxygenated blood back to the lungs to release carbon dioxide. Related Questions: … Read more
The stomach consists of several types of tissues working together: Epithelial tissue lines the stomach and secretes gastric juices, including digestive enzymes and hydrochloric acid. Muscular tissue allows the stomach to contract and churn food, aiding in digestion. Connective tissue supports and binds these tissues together. Nervous tissue regulates the muscular contractions and secretion of … Read more
(a) Organ and organelle: An organ is a collection of tissues working together to perform a specific function (e.g., heart, brain). An organelle is a subunit within a cell that performs a particular function (e.g., mitochondria, nucleus). (b) Animal and plant tissues: Animal tissues include epithelial, connective, muscular, and nervous tissues that perform various functions … Read more
The two main types of plant tissues involved in photosynthesis are palisade mesophyll and spongy mesophyll. Palisade mesophyll cells are rich in chloroplasts and are responsible for capturing light energy and conducting photosynthesis. Spongy mesophyll cells also contain chloroplasts and are involved in gas exchange and support for the process of photosynthesis. Related Questions: What … Read more
Epithelial tissue covers body surfaces, lines cavities, and forms glands. It serves protective functions, forms a barrier to harmful substances, and helps in absorption (e.g., in the intestine) and secretion (e.g., in glands). It is also involved in sensory reception and plays a role in maintaining homeostasis. Related Questions: What is the main difference between … Read more
Muscles work by contracting and relaxing, which causes the movement of body parts. Skeletal muscles, which are attached to bones, contract to pull on the bones, creating movement at joints. Cardiac muscles help in the contraction of the heart to pump blood, and smooth muscles facilitate movement within internal organs like the stomach and intestines. … Read more
Stomata are small pores located on the surface of leaves, primarily in the epidermis. They play a crucial role in the exchange of gases, allowing carbon dioxide to enter the leaf for photosynthesis and oxygen to exit. Stomata also regulate water loss through transpiration, which helps in cooling the plant and maintaining internal water balance. … Read more
Xylem and phloem are both vascular tissues responsible for the transport of materials in plants, but they serve different functions. Xylem transports water and dissolved minerals from the roots to the rest of the plant, while phloem transports the products of photosynthesis (primarily sugars) from the leaves to other parts of the plant. Related Questions: … Read more