What are spider body parts?

Spiders belong to the class Arachnida and have a unique body structure. Here are the main body parts of a spider:

1. Cephalothorax:

- Forms the front part of the spider's body.

- Fused head and thorax region covered by a hard exoskeleton.

- Contains the spider's brain, digestive system, and other vital organs.

2. Eyes:

- Most spiders have eight eyes arranged in various patterns.

- The main eyes are larger and provide sharp vision, while the secondary eyes detect movement and light intensity.

3. Chelicerae:

- Appendages located in front of the mouth.

- Consists of two segments, the basal segment, and the movable fang.

- Used for capturing and injecting venom into prey.

4. Pedipalps:

- Appendages located on either side of the chelicerae.

- Modified into various forms depending on the spider's sex and species.

- In males, one segment of the pedipalp is modified for reproduction.

5. Legs:

- Spiders have eight legs, which are jointed and covered with hairs.

- Each leg consists of seven segments: coxa, trochanter, femur, patella, tibia, metatarsus, and tarsus.

- The last segment (tarsus) often has claws or adhesive pads for climbing.

6. Abdomen:

- The posterior part of the spider's body.

- More flexible and expandable compared to the cephalothorax.

- Contains the spider's heart, respiratory system, reproductive organs, and silk-producing glands.

- Some spiders have spinnerets located at the tip of the abdomen, which produce silk for web-building, prey capture, and other purposes.

7. Book Lungs:

- Respiratory organs found in most spiders.

- Located on the underside of the abdomen and covered by a flap.

- Consists of thin, folded membranes that facilitate gas exchange.

8. Tracheae:

- Another respiratory system found in some spiders.

- Consists of a series of tubes that carry oxygen directly to different parts of the body.

9. Spinnerets:

- Small, retractable appendages located at the tip of the abdomen.

- Produce silk for web-building, prey capture, constructing egg sacs, and other purposes.

- Different spider species have different spinneret arrangements and silk types.

10. Spiracles:

- Small openings on the spider's body that allow air to enter the respiratory system.

- Usually located on the underside of the abdomen.

11. Epigynum:

- In female spiders, a modified structure located on the underside of the abdomen.

- Serves as the opening for sperm reception during mating.

12. Male Palpal Organs:

- Modified structures on the pedipalps of male spiders.

- Responsible for transferring sperm during reproduction.

These are the main body parts of spiders. The specific structures and adaptations of these body parts can vary among different spider species.