Why are the wings of a butterfly and bat not homologous?
The wings of a butterfly and the wings of a bat cannot be considered homologous because though the function of wings in both the cases is same, but they have different basic design. The butterfly has a fold of membranes as wings which are associated with few muscles but has no bones whereas the wings of bat are supported by bones.
Did you know that birds and bats have the same forearm?
Did you know that humans, birds, and bats have the exact same types of bones in their forearm? These organisms share the same forearm bones because they all evolved from a common ancestor. Human, bird, and bat forearm bones include the humerus, ulna, radius, carpals, metacarpals, and phalanges.
What are the two parts of a bat?
*The wings of a bat and the wings of a butterfly *the wing of a bat and the flipper of a whale *the feathers of a birds and the wing membrane of a bat *the wing of a bat and the scales of a fish *the antennae of an insect and the eye of a bird
What is the difference between bird bones and bat bones?
Bones of animals are strong and mostly dense, but they don't all have the same structure. Unlike human bones, birds have a lot more empty space inside their bones. Bird and bat bones also look smaller and more delicate than human bones. This was thought to make both bird and bat bones lighter so they can fly.
What bone looks like butterfly?
Anatomical Structure. The sphenoid bone is said to be 'butterfly-shaped'. It consists of a body, paired greater wings and lesser wings, and two pterygoid processes.
Which bone in the skull is often called bat-shaped or butterfly-shaped?
The sphenoid boneDefinition. The sphenoid bone of the skull base is one of the most complex bones of the body. It is an unpaired bone with many foramina (holes) and grooves that allow nerves and blood vessels to pass through or along it. The form of the sphenoid bone is often referred to as bat-shaped, wasp-shaped, or butterfly-shaped.
Which bone of the axial skeleton has a shape that is compared to a bat and has greater and lesser wings?
The sphenoid bone is described as having a central body and three pairs of processes known as the greater wings, lesser wings, and pterygoid processes.
What does the sphenoid bone form?
It helps form the base and lateral sides of the skull in combination with the orbital floor. Its many articulations with other bones give the skull rigidity. It is an attachment site for many of the muscles of mastication. A portion of the sphenoid forms the facial skeleton.
What is the vomer bone?
The vomer is a small, thin, plow-shaped, midline bone that occupies and divides the nasal cavity. It articulates inferiorly on the midline with the maxillae and the palatines, superiorly with the sphenoid via its wings, and anterosuperiorly with the ethmoid.
What is the ethmoid bone?
The ethmoid bone is an unpaired cranial bone that is a significant component of the upper nasal cavity and the nasal septum. The ethmoid bone also constitutes the medial orbit wall.
What bone is shaped like a bat?
Sphenoid Landmarks Our bat-shaped sphenoid is divided into a median body, two greater wings, two lesser wings, and two pterygoid plates. Think of the body of the sphenoid as the body of the bat it's shaped like: it is from the body that the wings and processes project. It is cubical in shape.
What does the sphenoid bone look like?
Shaped like a butterfly or a bat, it has a central body and two lateral wings on either side. It is one of the bones that make up the orbit, in particular, forming the posterior surface. The articulations of the sphenoid are with the frontal, parietal, ethmoid, zygomatic, temporal, occipital, palatine, and vomer bones.
How big is the sphenoid bone?
The immediate presellar width of the sphenoid sinus was 1.3 cm (0.4–2.5 cm), with a maximum width of 3.5 cm (1.9–7 cm). The height was 2.3 cm (1.2–3.6 cm). The suprasellar depth was 1.3 cm (0.4–2.8 cm), the presellar depth was 1.4 cm (0.4–2.6 cm), and the infrasellar depth was 2.6 cm (0.6–4 cm).
Where is occipital bone?
The occipital bone is the most posterior cranial bone and the main bone of the occiput. It is considered a flat bone, like all other cranial bones, meaning that its primary function is either for protection or to provide a broad surface for muscle attachment. The scalp, which consists of five layers, covers the bone.
What type of bone is the sphenoid bone quizlet?
a compound bone that forms the base of the cranium, behind the eye and below the front part of the brain. It has two pairs of broad lateral "wings" and a number of other projections, and contains two air-filled sinuses.
Where are the palatine bones?
The palatine bones contribute to the posterior part of the roof of the mouth and floor and lateral walls of the nose, the medial wall of the maxillary sinuses and the orbital floors. Each bone (Fig. 5-66) consists of horizontal and perpendicular plates (laminae) set at right angles to each other.
Which bone is separating the cranial cavity from the nasal cavity?
the horizontal plate of the ethmoid bone separating the cranial cavity from the nasal cavity,perforated with numerous foramina for the passage of the olfactory nerve filaments from the nasal cavity.
Where is the opening on the lateral side of the body?
Small opening on the lateral side of the body of the mandible on the internal surface of the ramus where the inferior alveolar nerve and inferior alveolar artery enter.
Which muscle is inserted into the mandible?
the anterior, non-articulating process of the ramus of the mandible which serves as the insertion for the temporalis muscle.
Which island is similar to the mainland?
Darwin found that some of the species on the Galapagos islands resembles species of the South American mainland
What are the similarities between salamanders and humans?
Humans share several features with salamanders. certain genes and proteins are nearly identical between the two species; Both species have four limbs with a similar skeletal structure; the species early embryos are very similar; and where the salamanders has a functional tail, humans have a vestigial tailbone. in evolutionary terms there's are examples of
What is the morphological species concept?
the morphological species concept relies upon comparing the DNA sequences of organisms
How is the Earth's surface shaped?
Earth's surface is shaped by natural forces that act gradually and are still acting
Is barking a heritable trait?
The tendency to bark in not a heritable trait