The body characteristics and body characteristics of arthropods ,,, urgent, urgent, urgent!

The body of arthropods has distinct segments (e.g., the body of an insect is divided into three segments: head, thorax, and abdomen) and segmentation (e.g., the thorax of an insect is divided into three segments, and the abdomen is also divided into several segments), and each segment has a number of paired, segmented appendages. The exoskeleton is wrapped around the outside of the body, forming a body cavity in which blood circulates openly.

1. The living habits of arthropods are diet, tropism, feign death and clustering. The phylum Arthropod is the largest phylum in the animal kingdom, commonly known as arthropods, including well-known shrimps, crabs, mosquitoes, flies, butterflies, spiders, centipedes, and extinct trilobites.

2. Morphological characteristics of arthropods. Arthropods are symmetrical on both sides of their bodies. It is composed of a column of body segments, which can be divided into three parts: head, thorax, and abdomen, or the head and chest are healed into cephalothorax, or the chest and abdomen are healed into the torso.

For example, the body of insects (locusts) is divided into three parts: head, thorax and abdomen; The body of Crustacea subphylum (shrimp) is divided into two parts: cephalothorax and abdomen; Arachnids (spiders) have a cephalothorax and abdomen; Myriapods (centipedes) have a head and a trunk. There is also a division of labor in the physiological functions of the body

Head: sensory and feeding center; Chest: Sports and Support Center; Abdomen:

Nutrition and reproduction centers.

I. Characteristics of the phylum Arthropod.

1. The body is composed of a series of body segments;

2. The whole body is covered with a layer of exoskeleton containing chitin;

3. Most of the body segments have paired segmented appendages;

4. The body cavity is the blood cavity, and the circulatory organ, the dorsal blood vessel, is located on the back of the digestive tract, with the large artery opening in the head cavity, and the blood circulation is opened;

5. The central nervous system is composed of a series of paired ganglia, the brain is located on the back of the digestive tract within the head, and the ventral nerve cord is located on the ventral surface of the digestive tract.

The main characteristic of arthropods is that the body is composed of many body segments and is segmented; There is an exoskeleton on the body surface; The feet and antennae are also segmented; In addition, there are a pair of antennae and a mouthpart on the head of arthropods, some have monocular and compound eyes, and some only have compound eyes, so arthropods are very adaptable to the environment

Therefore, the answer is: the body is composed of many body segments, and they are divided; There is an exoskeleton on the body surface; Foot and antennae segmented

Arthropods are characterized by the fact that the body is composed of many body segments and is segmented, with an exoskeleton on the body surface, and segmented feet and antennae

So the answer is: somites; Exoskeleton; Sectional

1. The high development of heterorhythmic sections;

2. An exoskeleton with a chitin protein complex;

3. Appendages are segmented and related; The striated muscles are well developed and can contract rapidly;

4. Open tube blood circulation;

5. The body wall is invaginated to form the trachea as a respiratory organ;

6. The excretory system is formed by the intestinal wall protruding outward;

7. Well-developed nervous system and sensory organs;

8. The vast majority of them are dioecious, fertilized in vivo.

Arthropods are characterized by having many body segments on the body, which makes the animal's movement more flexible, and is segmented, with an exoskeleton on the body surface, which has protection and support, and can also reduce the evaporation of water in the body, and the feet and antennae are also segmented Common arthropods are locusts, centipedes, shrimps, spiders, and crabs

Therefore, the answer is: the body is composed of many body segments, and it is divided, the body surface has an exoskeleton, and the feet and antennae are also segmented; Spiders, centipedes, shrimps

(1) A well-developed and thick exoskeleton;

b) Efficient respiratory organs Trachea (mainly found in insects and myriapoda) (iii) well-developed nervous system;

d) the division of the different rhythms and the divisions of the body;

v) segmented appendages;

6) Sensitive sensory organs;

vii) Bones with chitin and protein in vitro.

The main characteristic of arthropods is that the body is composed of many body segments and is segmented; There is an exoskeleton on the body surface; The feet and antennae are also segmented; In addition, there are a pair of antennae and a mouthpart on the head of arthropods, some have monocular and compound eyes, and some only have compound eyes, so arthropods are very adaptable to the environment

Therefore, the answer is: the body is composed of many body segments, and they are divided; There is an exoskeleton on the body surface; Foot and antennae segmented

There is a tough exoskeleton on the body surface; Both the body and appendages are segmented.