Title: Spider Excretory Systems Quiz**Question:**In spiders, excretions of wastes from the body are handled by (mark all that apply):- [ ] the Malpighian tubules- [ ] the Corsican mafia- [ ] the stercoral pocket- [ ] the coxal glands- [ ] the lateral line- [ ] the book gills- [ ] the antennal gland**Instructions:**Review each option carefully and select all the appropriate mechanisms responsible for excretion in spiders. Note that some options listed may not be related to spiders or biological systems. **Question:**In spiders, gas exchange is supplied by (mark all that apply):- [ ] book lungs- [ ] book gills- [ ] Malpighian tubules- [ ] epidermis- [ ] tracheae- [ ] spiracles- [ ] green glands- [ ] Home Depot**Explanation:**Spiders typically utilize book lungs and/or tracheae for gas exchange. Book lungs are specialized respiratory structures found in many arachnids, consisting of stacked, leaf-like structures that increase surface area for gas exchange. Tracheae are small tubes that directly deliver oxygen to the spider's tissues and are connected to the exterior through openings called spiracles. Other options listed, such as Malpighian tubules and green glands, are involved in excretion, not respiration. "Home Depot" is an unrelated choice.

Spiders are members of the chelicerates group, the arachnids. They are the largest order of "arachnids" and rank 7th in total species diversity among all orders of organisms. Spiders are air-breathing arthropods that have: - Eight legs; Chelicerae with fangs can usually inject venom; Spinnerets that extrude silk; Segmented bodies with jointed limbs, all covered in a cuticle comprised of chitin and proteins; and Heads are composed of several segments, that fuse during the embryo's development. 1. Malpighian tubules: - The Malpighian tubule is the principal excretory organ of spiders (arachnids). Hence, the option "Malpighian tubules" is correct. Corsican mafia: - The Corsican mafia is a collection of criminal organisations that emerged in Corsica and are affiliated with the Frensch Mob. Hence, the option "Corsican mafia" is incorrect. Stercoral pocket: - Spiders produces uric acids, which does not dissolve in water. The malpighian tubules drain uric acid waste into a pouch attached to the digestive tract called a stercoral pocket. As a result, uric acid waste from the "kidneys" is combined with solid waste from the digestive tract and eliminated together. Hence, the option "Stercoral pocket" is correct. Coxal glands: - Spiders excrete their waste materials with the help of coxal glands. They open on the coxae of the walking legs, and there is usually just one pair (two in some spiders). A sac in these glands helps in the collection and storage of waste products. These glands are generally found in pairs. The coxa is the pore through which urine emerges from the collecting sac. Hence, the option "Coxal glands" is correct. Lateral line: - The lateral line, also known as the lateral line system (LLS) or the lateral line organ (LLO), is a sensory organ found in aquatic jawed vertebrates that perceives movement, vibration, and pressure gradients in the water. Hence, the option "Lateral line" is incorrect. Book gills: - Book gills are flap-like appendages seen in marine arthropods (Example: Limulus-Horseshoe crab) that help with gas exchange in the water. Hence, the option "Book gills" is incorrect. Antennal gland: - The antennal glands or the green glands are paired glands (in prawns, shrimps, etc.), that help in the elimination of ammonia waste from the body. Hence, the option "Antennal gland" is incorrect. Hence, the correct options are The malpighian tubules; The stercoral pocket; and The coxal glands2. Book lungs: - A book lung is a type of respiratory organ seen in many arachnids, such as scorpions and spiders, that is used for atmospheric gas exchange. Hence, the option "Book lungs" is correct. Book gills: - Book gills are flap-like appendages seen in marine arthropods (Example: Limulus-Horseshoe crab) that help with gas exchange in the water. Hence, the option "Book gills" is incorrect. Malpighian tubules: - The Malpighian tubule is the principal excretory organ of spiders (arachnids). Hence, the option "Malpighian tubules" is incorrect. Epidermis: - The epidermis helps in the regulation of gas exchange in plants because it contains stomata, opening through which the exchange of gases takes place. Hence, the option "Epidermis" is incorrect. Trachea: - Spiders and insects both have trachea, which are breathing structures. In spiders, the tracheae play an important role in gas exchange. Hence, the option "Trachea" is correct. Spiracles: - The trachea allows the passage of air from book lungs to the surface through tiny holes called spiracles. Hence, the option "Spiracles" is correct. Green glands: - The antennal glands or the green glands are paired glands (in prawns, shrimps, etc.), that help in the elimination of ammonia waste from the body. Hence, the option "Green glands" is incorrect. Home Depot: - Home Depot is a place for storing goods or motor vehicles. Hence, the option "Home Depot" is incorrect. Hence, in spiders, the gas exchange is supplied by Book lungs; Trachea; and Spiracles