diff --git a/lib/api/src/externals/function.rs b/lib/api/src/externals/function.rs
index ce0dc51d2..4571542f6 100644
--- a/lib/api/src/externals/function.rs
+++ b/lib/api/src/externals/function.rs
@@ -40,10 +40,12 @@ pub enum FunctionDefinition {
 /// A WebAssembly `function` instance.
 ///
 /// A function instance is the runtime representation of a function.
-/// It effectively is a closure of the original function over the runtime
-/// `Instance` of its originating `Module`. The module instance is used
-/// to resolve references to other definitions during execution of the
-/// function.
+/// It effectively is a closure of the original function (defined in either
+/// the host or the WebAssembly module) over the runtime `Instance` of its
+/// originating `Module`.
+/// 
+/// The module instance is used to resolve references to other definitions
+/// during execution of the function.
 ///
 /// Spec: https://webassembly.github.io/spec/core/exec/runtime.html#function-instances
 #[derive(Clone, PartialEq)]
@@ -195,7 +197,7 @@ impl Function {
         }
     }
 
-    /// Returns the underlying [`FunctionType`] corresponding to this runtime `Function`.
+    /// Returns the [`FunctionType`] of the `Function`.
     pub fn ty(&self) -> &FunctionType {
         &self.exported.signature
     }
diff --git a/lib/api/src/externals/global.rs b/lib/api/src/externals/global.rs
index 30132aa39..86c33fbd4 100644
--- a/lib/api/src/externals/global.rs
+++ b/lib/api/src/externals/global.rs
@@ -60,7 +60,7 @@ impl Global {
         })
     }
 
-    /// Returns the underlying [`GlobalType`] corresponding to this runtime `Global`.
+    /// Returns the [`GlobalType`] of the `Global`.
     pub fn ty(&self) -> &GlobalType {
         &self.exported.global
     }
diff --git a/lib/api/src/externals/memory.rs b/lib/api/src/externals/memory.rs
index 50006e4c4..e96bc5a59 100644
--- a/lib/api/src/externals/memory.rs
+++ b/lib/api/src/externals/memory.rs
@@ -10,7 +10,7 @@ use wasmer_vm::{Export, ExportMemory, Memory as RuntimeMemory, MemoryError};
 /// A WebAssembly `memory` instance.
 ///
 /// A memory instance is the runtime representation of a linear memory.
-/// It holds a vector of bytes and an optional maximum size.
+/// It consists of a vector of bytes and an optional maximum size.
 ///
 /// The length of the vector always is a multiple of the WebAssembly
 /// page size, which is defined to be the constant 65536 – abbreviated 64Ki.
@@ -42,7 +42,7 @@ impl Memory {
         })
     }
 
-    /// Returns the underlying [`MemoryType`] corresponding to this runtime `Memory`.
+    /// Returns the [`MemoryType`] of the `Memory`.
     pub fn ty(&self) -> &MemoryType {
         self.memory.ty()
     }
@@ -74,7 +74,7 @@ impl Memory {
         slice::from_raw_parts_mut(def.base, def.current_length)
     }
 
-    /// Returns the pointer to the `Memory`.
+    /// Returns the pointer to the raw bytes of the `Memory`.
     pub fn data_ptr(&self) -> *mut u8 {
         let definition = self.memory.vmmemory();
         let def = unsafe { definition.as_ref() };
diff --git a/lib/api/src/externals/mod.rs b/lib/api/src/externals/mod.rs
index 87759246a..1732854fe 100644
--- a/lib/api/src/externals/mod.rs
+++ b/lib/api/src/externals/mod.rs
@@ -15,19 +15,19 @@ use crate::store::{Store, StoreObject};
 use crate::ExternType;
 use wasmer_vm::Export;
 
-/// An external value is the runtime representation of an entity that
+/// An `Extern` is the runtime representation of an entity that
 /// can be imported or exported.
 ///
 /// Spec: https://webassembly.github.io/spec/core/exec/runtime.html#external-values
 #[derive(Clone)]
 pub enum Extern {
-    /// A external [`Function`]
+    /// A external [`Function`].
     Function(Function),
-    /// A external [`Global`]
+    /// A external [`Global`].
     Global(Global),
-    /// A external [`Table`]
+    /// A external [`Table`].
     Table(Table),
-    /// A external [`Memory`]
+    /// A external [`Memory`].
     Memory(Memory),
 }
 
diff --git a/lib/api/src/externals/table.rs b/lib/api/src/externals/table.rs
index 353d72d5f..bd84a009b 100644
--- a/lib/api/src/externals/table.rs
+++ b/lib/api/src/externals/table.rs
@@ -55,7 +55,7 @@ impl Table {
         })
     }
 
-    /// Gets the underlying [`TableType`].
+    /// Returns the [`TableType`] of the `Table`.
     pub fn ty(&self) -> &TableType {
         self.table.ty()
     }