Educational spider anatomy labeling worksheet for students.

To label the spider correctly, we need to identify the main body parts and appendages shown in the diagram. Spiders have two main body sections and several pairs of legs and other appendages near the head.

Here is the step-by-step identification for each line:

1. Top horizontal line (above the front legs): This line indicates the entire front section of the spider's body. In spiders, this fused head and thorax region is called the Cephalothorax.
2. Line pointing to the large rear section: This is the second main body part, which contains the digestive and reproductive organs. It is called the Abdomen.
3. Line pointing to the long, jointed limbs on the side: These are the walking legs. Spiders always have four pairs of these. The label is Leg (or Walking Leg).
4. Line pointing to the small appendages next to the mouth: Located between the eyes/face and the first pair of walking legs, these are used for handling food. They are called Pedipalps (or Palps).
5. Line pointing to the fang-like structures at the very front: These are the modified first pair of appendages that contain venom glands. They are called Chelicerae (or Fangs).
6. Bottom horizontal line (under the abdomen): This line indicates the entire rear section of the body. Like the top line, it labels a major body region. This is the Abdomen.

*Note: Since there are two lines pointing to the rear body section (one specific arrow and one general bracket), both should be labeled "Abdomen," or the specific arrow could be labeled "Spinnerets" if it pointed directly to the tips, but here it points to the whole segment. Given the symmetry with the top line labeling the Cephalothorax, the bottom line labels the Abdomen.*

Let's refine the labels based on standard spider anatomy diagrams for students:

- Top Bracket: Cephalothorax
- Arrow to front "fangs": Chelicerae
- Arrow to small leg-like parts near mouth: Pedipalps
- Arrow to long side limb: Leg
- Arrow to main rear body sac: Abdomen
- Bottom Bracket: Abdomen

Wait, looking closely at the bottom left arrow vs the bottom right bracket.
- The arrow on the bottom left points to the tip of the abdomen where the silk comes out. Those are the Spinnerets.
- The bracket on the bottom right encompasses the whole rear section. That is the Abdomen.
- The bracket on the top encompasses the whole front section. That is the Cephalothorax.
- The arrow on the top middle points to the fangs. Those are Chelicerae.
- The arrow on the right points to the small appendage near the face. Those are Pedipalps.
- The arrow on the left points to the long walking limb. That is a Leg.

Let's re-verify the positions:
1. Top Center Arrow: Points to the fangs/mouthparts. -> Chelicerae
2. Top Right Bracket: Actually, looking at the layout, the top horizontal line is a bracket over the front body. -> Cephalothorax
3. Right Side Top Arrow: Points to the short appendage between the chelicerae and the first leg. -> Pedipalp
4. Left Side Middle Arrow: Points to the long walking leg. -> Leg
5. Right Side Bottom Arrow: Points to the large rear body section. -> Abdomen
6. Bottom Left Arrow: Points specifically to the protrusions at the very end of the abdomen. -> Spinnerets
7. Bottom Right Bracket: Encompasses the entire rear body section. -> Abdomen

Actually, let's look at the lines again carefully.
- Top horizontal line: Spans the width of the front body. Label: Cephalothorax.
- Arrow below top line: Points to the fangs. Label: Chelicerae.
- Arrow on the right (upper): Points to the pedipalp. Label: Pedipalp.
- Arrow on the left (middle): Points to the walking leg. Label: Leg.
- Arrow on the right (lower): Points to the main part of the rear body. Label: Abdomen.
- Arrow on the bottom left: Points to the spinnerets at the tip. Label: Spinnerets.
- Bottom horizontal line: Spans the width of the rear body. Label: Abdomen.

It seems redundant to label Abdomen twice, but one is a specific pointer to the bulk, and one is a bracket for the whole region. Alternatively, the bottom left arrow might just be pointing to the abdomen generally, and the bottom right bracket is also the abdomen. However, usually, these diagrams test specific parts. The tip structures are distinct. Let's assume the bottom-left arrow is Spinnerets because it points precisely to the nipples at the end.

Let's organize the final list clearly for the student.

Final Answer:
Here are the correct labels for the spider diagram:

* Top horizontal line: Cephalothorax
* Arrow pointing to the fangs (top center): Chelicerae
* Arrow pointing to the small arm near the mouth (right): Pedipalp
* Arrow pointing to the long leg (left): Leg
* Arrow pointing to the large rear body section (right): Abdomen
* Arrow pointing to the tip of the rear section (bottom left): Spinnerets
* Bottom horizontal line: Abdomen