Antonio Donlucas Larios Geology 7 Tues/Thurs 9:00 AM Vestigial Structures and Evolution Vestigial Structures are organs which are degenerated, atrophied, or in imperfect condition or form (Miller). These organs are important to showing evolution since they are useless limbs that at one point in our ancestry were useful for our daily functions. As stated by the article on livescience.com, the function of those vestigial organs eventually ceases to help the host and as such just stops working (Miller). Vestigial structures help us trace evolution because they show how species in the animal kingdom have changed over time. The appendix for example is present in vertebrate herbivores, so at one point the human ancestors probably had a very herb based diet (Miller). Another example is the hind legs on whales (Miller). They show that at one point, whales were land dwelling creatures, possibly amphibious, that decided to return to the sea life. The hind legs are completely useless to the present day whale, also the appendix to humans, but it shows that at one point in our timeline our ances...
“The Lovely Bones” is a book written by Alice Sebold. It was published in 2002, and it’s about Susie Salmon, a girl that was murdered and no watches her family and murderer from her own heaven. She tries to balance her feeling and watch out for her family since her murderer is still free and with nobody knowing how dangerous he is. In 2009, a movie adapted from the book came out as well.
In the book, Your Inner Fish, by Neil Shubin he presents the notion of evolution and how we can trace parts that make up the human body back to jellyfish, worms, and even fish. The book not only discusses how we arose to be what we are today, but also the implications our ancestors had on our current body plan. In this essay, I will demonstrate that I have digested the entirety of Shubin’s book by convincing you (dear reader) that everything in our bodies is based on simple changes to already existing systems. To make this case, I will use the evidence of limb development in a vast array of organisms, the four arches found in the embryological stage of development, the structures inside our noses, and how our ears have come about all due to modifications.
The musculoskeletal system offers support and stability for your body so we can properly function and move around. Different types of muscle within the muscular system include cardiac, skeletal, and smooth. The reason our bodies are capable of producing movement is because of the way our muscles contract. Our adult skeletal structure is made up of 206 bones that all differ in shapes and sizes. The composing parts that make up the system include the bones, joints, and muscles that all connect so we’re capable of moving. These components allow for our bodies to maintain a stable structure that can keep us upright. The axial skeleton refers to the skull, the vertebral column which supports the spinal cord, ribs, and sternum. It offers protections
The skeletal system is composed of many bones, joints, cartilage, ligaments, and tendons. The key functions of the skeletal system are to supply a supportive frame for the body, to shield the internal organs such as the heart and lungs. Providing attachment points for muscles is also another function as this enables the parts of the animal to have good locomotion, the long bones produce bone marrow. However, for this report, I will be concentrating more on the joints of the canine skeletal system. The joints are the articular exteriors at the end of the bones, they are shielded by a coating of cartilage. There are three main types of joints within the canine skeletal system they consist of the fibrous joints, these do not allow any movement
The skeletal system is made of all the bones, connective tissues and joints in the body. Bones, cartilage are some of the bones that make up the Skeletal system. The Skeletal system helps perform important everyday functions, for example; support, movement and protection, etc. The skeletal system helps form blood cells. The skeletal system helps store calcium and phosphorus, which is important and beneficial to the other functions in the body.
Acanthostega had a fish-like tail and gills for breathing under water, this being the aquatic part of it. But at the ends of the arms were “peddle-shaped” appendages, thought to be the first “hands” on Earth. Clack’s discovery proved that some fish had arms and legs in the water. It showed that arms and legs were already evolved before organisms started actually living on land, they were used more for survival than walking. In a sense, the “blueprints” of an arm were already in place.
Flat bones – these include Scapula, sternum, cranium, os coxae, pelvis and ribs . Their main function is to provide protection to the body’s vital organs as well as being a base for muscular attachment.
The skeletal system is an anatomical body system which consists of all the bones and joints in our bodies. In total, an adult body entails 206 distinct bones, arranged in the axial skeleton (80) and the appendicular skeleton (126). The latter division has bones in the limbs, pelvic girdle and the shoulder girdle, whilst the rest of the bones belong to the axial division. It’s a very important system therefore it has a few main functions. The most obvious is that it gives the body its rigid shape, which makes it relevant to other body functions like breathing, which is helped by the rib cage expanding to accommodate the movement of the lungs. Other functions include support to ensure that organs
Anatomy is a study of the structure or internal workings of something and physiology is the branch of biology that deals with the normal functions of living organisms and their parts. A cosmetologist practice beautifying the face, hair and skin of their clients and a nail tech purpose is to take care of both finger and toenails.
The skeletal system is composed of two hundred and six bones in the human body. Functions such as the tendons, cartilage, and ligaments connect the bones and tissues together. Bone tissues make up about 18% of the weight of the human body. There are two types of tissue inside the bones. They consist of; compact bone and spongy bone. First, compact bone depicts the main shaft of long bones in the human body such as the arms and legs. Its tissue is dense and hard and it also makes up the outer layer of most bones in our body. Meanwhile, spongy bone tissue is made up of smaller plates occupied with red bone marrow. Mostly, it is found at the ends of long bones such as the head of the femur.
Throughout the human evolution fossils have been found and each bone discovered demonstrates how the early hominids to the modern human features have changed. Each bone showed off different stories and new facts. Even the inner ear bone has changed in shape and in size throughout the early hominids. Over time the littlest things have changed but it seem like it helped surviving better, by helping to be able to be bipeds and tool making. The early hominids are truly amazing and indeed have been an important part of modern humans and the human evolution its self.
also used for example in a rugby scum, to body needs to be placed in
Physical development also supports a child’s personal social and emotional development. If a child can participate in physical activity they learn about the environment around them. By being able to participate in team sports a child can increase in confidence and control (Nurse, 2009).
The Skeletal System, also known as the Skeleton make up a framework that support the body and protect the organs. The Skeleton consists of the bones and joints of the body. In the human body there is 300 bones at birth, these then fuse together to make 206 bones in a fully grown adult. The Skeleton is made up of two divisions: The axial and appendicular Skeleton.