The major bony components of the thorax are the sternum, thoracic vertebrae and ribs. These bony components are in conjunction with intervertebral discs and costal cartilage.Know More
The top of the thorax contains the sternum, which can also be referred to as the breastbone. This is a flat bone that helps to protect the rest of the thorax. It is a long, sword shaped bone with a piece of cartilage on the end called the xiphoid process. It is located in between the two collarbones.
Thoracic vertebrae are similar to the lumbar vertebrae that are located in the back. There are 12 vertebrae in the thoracic system. They work together with the sternum to hold the ribs into place and are there for the protection of the organs that are in the ribcage system. The way these vertebrae articulate, or move, is important to the way that the ribs move.
There are 12 ribs in the thorax. They are resilient and lightweight, making them ideal for the organ protection they provide. There are true ribs, false ribs and floating ribs. True ribs are connected to the sternum with costal cartilage. False ribs are only attached to other ribs and do not ever directly touch the sternum. Floating ribs are only connected to the thoracic vertebrae and "float" in the thorax area.Learn more about Zoology
Grasshoppers breathe through 10 pairs of tiny holes called spiracles, which are located in the thorax and abdomen. Air enters the grasshopper's body through the front spiracles and exits through the rear.Full Answer >
Although walking stick insects do not have a venomous sting or bite, some species can discharge a milky acidic spray from glands at the rear of the thorax. They can spray it accurately at predators at a range of up to two feet.Full Answer >
The diaphragm is the muscular wall that separates the thorax from the abdomen regions. The diaphragm, which is dome-shaped and extends across the rib cage's bottom, is made up of the peripheral muscle and central tendon.Full Answer >
Honeybees and bumblebees both have three pairs of legs, for a total of six, connected to their thorax. Each leg is made up of five segments separated by joints. The closest segment to the body, called the coxa, is followed in descending order by the trochanter, femur, tibia and tarsus.Full Answer >