Does a rattlesnake have an exoskeleton?
SNAKE. When snakes molt, they leave behind their old skin in one piece. Because they don’t have exoskeletons like arthropods, snakes remove their skin in a process that’s also called shedding. “The shedding of skin all in one piece is unusual for vertebrates,” says biologist Harvey B.
Do animals with exoskeletons have backbones?
An exoskeleton is a hard covering that supports and protects the bodies of some types of animals. The word exoskeleton means “outside skeleton.” Many invertebrates, or animals without backbones, have exoskeletons. Insects are the largest group of animals that have an exoskeleton. But their exoskeletons do not grow.
What are 2 advantages and 2 disadvantages of having an exoskeleton?
Advantages of exoskeleton: 1) they allow complex movements due to jointed appendages….Disadvantages of exoskeleton :
- they cannot stretch or expand.
- special modification are required for gaseous exchange and sensory pick up.
- it is a major restriction on growth.
- it needs to be shed at regular intervals.
What are the disadvantages of having an endoskeleton?
Disadvantages of the endoskeleton
- Vulnerable to external environment: The endoskeleton does not offer the animal any protection from the exterior, be it a physical attack or changes in environmental conditions.
- Susceptible to disease: The skeleton consists of living tissue so is susceptible to infections and disease.
What might be some disadvantages of having an exoskeleton?
List of the Disadvantages of an Exoskeleton. 1. Exoskeletons don’t stretch or expand. An exoskeleton is unable to take the same amount of shock that a soft tissue outer layer can withstand.
Why is exoskeleton thin and soft?
At the junction, or joints, between the plates and cylinders the exoskeleton is thin and flexible because it lacks the exocuticle and because it is folded. The folds provide additional surface area as the joints are bent.
What are advantages of a through gut?
The advantage of a through gut in members of the phylum Annelida is that the soil-dwelling species and those that feed by crawling along the floor of an aquatic ecosystem can continually feed as they move forward without repeatedly ingesting their own waste.
What advantages does an organism with a mesoderm have?
A true coelom is lined on all sides by mesoderm which gives rise to muscles that surround the gut as well as underlying the body wall. This allows more efficient digestion because food can be pushed through the digestive tract by muscles. Cleavage is spiral.
What is complete gut?
Complete Gut and Regional Specialization: A complete gut is a digestive tract that has an anal and oral opening. The earthworm, and many other animals, accomplishes this through a circulatory system that absorbs the digested nutrients into the blood which then transports them to all parts of the body.
What happens when the digestive system is not healthy?
An unhealthy digestive system can impair your body’s ability to absorb nutrients, store fat and regulate blood sugar. Insulin resistance or the urge to overeat due to decreased nutrient absorption might cause weight gain. On the other hand, weight loss may be a result of bacterial overgrowth in the small intestine.
What gastroparesis feels like?
Gastroparesis is a disease in which the stomach cannot empty itself of food in a normal fashion. Symptoms include heartburn, nausea, vomiting, and feeling full quickly when eating. Treatments include medications and possibly surgery.
What is the best medicine for gastroparesis?
Medications to treat gastroparesis may include:
- Medications to stimulate the stomach muscles. These medications include metoclopramide (Reglan) and erythromycin.
- Medications to control nausea and vomiting. Drugs that help ease nausea and vomiting include diphenhydramine (Benadryl, others) and ondansetron (Zofran).