Name the hormones secreted by corpora cardiaca and corpora allata.

Explanation

### Step-by-Step Solution:

1. **Identify the Glands**: The question asks about the hormones secreted by two specific glands in insects: corpora cardiaca and corpora allata.

2. **Hormones from Corpora Cardiaca**:
- The corpora cardiaca is known to secrete a hormone called **Prothoracicotropic Hormone (PTTH)**.
- This hormone plays a crucial role in regulating growth and development in insects by stimulating the prothoracic glands to produce ecdysteroids, which are involved in molting and metamorphosis.

...